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Miner SES, Gori T. Mechanisms Matter: Combining Invasive Metrics to Better Define Microvascular Dysfunction. Circ Cardiovasc Interv 2024; 17:e014195. [PMID: 38726685 DOI: 10.1161/circinterventions.124.014195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Affiliation(s)
- Steven E S Miner
- Division of Cardiology, Southlake Regional Health Centre, Newmarket, Ontario, Canada (S.E.S.M.)
| | - Tommaso Gori
- Department of Cardiology, Cardiology I, University Medical Center Mainz, Germany (T.G.)
- German Centre for Cardiovascular Research, Standort RheinMain, Frankfurt, Germany (T.G.)
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2
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Weferling M, Rolf A, Treiber J, Fischer-Rasokat U, Liebetrau C, Hamm CW, Dey D, Kim WK. Epicardial fat volume is associated with primary coronary slow-flow phenomenon in patients with severe aortic stenosis undergoing transcatheter valve implantation. BMC Cardiovasc Disord 2024; 24:253. [PMID: 38750455 PMCID: PMC11097472 DOI: 10.1186/s12872-024-03927-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 05/07/2024] [Indexed: 05/18/2024] Open
Abstract
BACKGROUND Primary coronary slow flow (CSF) is defined as delayed opacification of the distal epicardial vasculature during coronary angiography in the absence of relevant coronary artery stenoses. Microvascular disease is thought to be the underlying cause of this pathology. Epicardial fat tissue (EFT) is an active endocrine organ directly surrounding the coronary arteries that provides pro-inflammatory factors to the adjacent tissue by paracrine and vasocrine mechanisms. The aim of the present study was to investigate a potential association between EFT and primary CSF and whether EFT can predict the presence of primary CSF. METHODS Between 2016 and 2017, n = 88 patients with high-grade aortic stenosis who were planned for transcatheter aortic valve implantation (TAVI) were included in this retrospective study. EFT volume was measured by pre-TAVI computed tomography (CT) using dedicated software. The presence of primary CSF was defined based on the TIMI frame count from the pre-TAVI coronary angiograms. RESULTS Thirty-nine of 88 TAVI patients had CSF (44.3%). EFT volume was markedly higher in patients with CSF (142 ml [IQR 107-180] vs. 113 ml [IQR 89-147]; p = 0.009) and was strongly associated with the presence of CSF (OR 1.012 [95%CI 1.002-1.021]; p = 0.014). After adjustment, EFT volume was still an independent predictor of CSF (OR 1.016 [95%CI 1.004-1.026]; p = 0.009). CONCLUSION Primary CSF was independently associated with increased EFT volume. Further studies are needed to validate this finding and elucidate whether a causal relationship exists.
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Affiliation(s)
- Maren Weferling
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany.
- German Centre for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt, Germany.
| | - Andreas Rolf
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany
| | - Julia Treiber
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany
| | - Ulrich Fischer-Rasokat
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany
| | - Christoph Liebetrau
- Cardioangiological Center Bethanien (CCB), Department of Cardiology, Agaplesion Bethanien Hospital, Frankfurt, Germany
| | - Christian W Hamm
- German Centre for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt, Germany
- Department of Cardiology, University Hospital of Giessen, Giessen, Germany
| | - Damini Dey
- Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd, Taper A238, Los Angeles, CA, 90048, USA
| | - Won-Keun Kim
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Benekestr. 2-8, 61231, Bad Nauheim, Germany
- German Centre for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt, Germany
- Kerckhoff Heart and Thorax Center, Department of Cardiac Surgery, Bad Nauheim, Germany
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3
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Zhu Q, Wang S, Huang X, Zhao C, Wang Y, Li X, Jia D, Ma C. Understanding the pathogenesis of coronary slow flow: Recent advances. Trends Cardiovasc Med 2024; 34:137-144. [PMID: 36516963 DOI: 10.1016/j.tcm.2022.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 11/24/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022]
Abstract
Coronary slow flow is taken to be indicative of delayed filling of terminal vessels of the coronary arteries in the absence of coronary stenosis, as detected using coronary angiography. Patients suffering from coronary slow flow typically experience recurrent chest pain, thereby markedly affecting their quality of life. The etiology and pathogenesis of coronary slow flow, which is gradually attracting clinical attention, have yet to be sufficiently established, although it is currently believed that they may be associated with endothelial dysfunction in the coronary arteries, inflammatory response, abnormalities in microvascular reserve function, subclinical atherosclerosis, blood cell and platelet abnormalities, and genetic factors. In this review, we provide a brief overview of recent progress in research on the pathogenesis of coronary slow flow with a view toward elucidating the possible underlying pathogenesis and identify targets and directions for the treatment of this condition.
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Affiliation(s)
- Qing Zhu
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China; Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
| | - Shitong Wang
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China; Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
| | - Xin Huang
- Department of Radiology, The First Hospital of China Medical University, Shenyang, China
| | - Cuiting Zhao
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China; Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
| | - Yonghuai Wang
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China; Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
| | - Xinxin Li
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China; Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China
| | - Dalin Jia
- Department of Cardiology, The First Hospital of China Medical University, Shenyang, China
| | - Chunyan Ma
- Department of Cardiovascular Ultrasound, The First Hospital of China Medical University, Shenyang, China; Clinical Medical Research Center of Imaging in Liaoning Province, Shenyang, China.
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4
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Marchini F, Pompei G, D'Aniello E, Marrone A, Caglioni S, Biscaglia S, Campo G, Tebaldi M. Shedding Light on Treatment Options for Coronary Vasomotor Disorders: A Systematic Review. Cardiovasc Drugs Ther 2024; 38:151-161. [PMID: 35678926 PMCID: PMC10876767 DOI: 10.1007/s10557-022-07351-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/30/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE Coronary vasomotor dysfunction embraces two specific clinical entities: coronary (micro)vascular spasm and microvascular dysfunction. The clinical manifestations of these entities are respectively called vasospastic angina (VSA) and microvascular angina (MVA). Over the years, these diseases have become more and more prominent and several studies aimed to investigate the best diagnostic and therapeutic strategies. Patients with coronary vasomotor disorders are often undertreated due to the absence of evidence-based guidelines. The purpose of this overview is to illustrate the various therapeutic options available for the optimized management of these patients. METHODS A Medline search of full-text articles published in English from 1980 to April 2022 was performed. The main analyzed aspects of vasomotor disorders were treatment options. We also performed research on "Clinicaltrial.gov" for ongoing trials. CONCLUSION Coronary (micro)vascular spasm and microvascular dysfunction are clinical entities characterized by high prevalence and clinical representation. Several therapeutic strategies, both innovative and established, are available to optimize treatment and improve the quality of life of these patients.
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Affiliation(s)
- Federico Marchini
- Cardiology Unit, Azienda Ospedaliero Universitaria Di Ferrara, Via Aldo Moro 8, 44124, Cona, FE, Italy
| | - Graziella Pompei
- Cardiology Unit, Azienda Ospedaliero Universitaria Di Ferrara, Via Aldo Moro 8, 44124, Cona, FE, Italy
| | - Emanuele D'Aniello
- Cardiology Unit, Azienda Ospedaliero Universitaria Di Ferrara, Via Aldo Moro 8, 44124, Cona, FE, Italy
| | - Andrea Marrone
- Cardiology Unit, Azienda Ospedaliero Universitaria Di Ferrara, Via Aldo Moro 8, 44124, Cona, FE, Italy
| | - Serena Caglioni
- Cardiology Unit, Azienda Ospedaliero Universitaria Di Ferrara, Via Aldo Moro 8, 44124, Cona, FE, Italy
| | - Simone Biscaglia
- Cardiology Unit, Azienda Ospedaliero Universitaria Di Ferrara, Via Aldo Moro 8, 44124, Cona, FE, Italy
| | - Gianluca Campo
- Cardiology Unit, Azienda Ospedaliero Universitaria Di Ferrara, Via Aldo Moro 8, 44124, Cona, FE, Italy
| | - Matteo Tebaldi
- Cardiology Unit, Azienda Ospedaliero Universitaria Di Ferrara, Via Aldo Moro 8, 44124, Cona, FE, Italy.
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5
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Yamazaki T, Saito Y, Yamashita D, Kitahara H, Kobayashi Y. Relation of Thrombolysis in Myocardial Infarction Frame Count to Invasively Measured Coronary Physiologic Indexes. Am J Cardiol 2024; 211:282-286. [PMID: 37980999 DOI: 10.1016/j.amjcard.2023.11.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 11/06/2023] [Accepted: 11/11/2023] [Indexed: 11/21/2023]
Abstract
In the international guidelines, higher thrombolysis in myocardial infarction frame count (TFC) is indicated as evidence of coronary microvascular dysfunction (CMD). However, the association of TFC with invasively measured coronary physiologic parameters such as coronary flow reserve (CFR) and index of microcirculatory resistance (IMR) remains unclear. Patients without significant epicardial coronary lesions underwent invasive coronary physiologic assessment using a thermodilution method in the left anterior descending artery. Corrected TFC (cTFC) was evaluated on coronary angiography. The cut-off values of CFR and IMR were defined as ≤2.0 and >25, and patients with abnormal CFR and/or IMR were defined as having CMD. This study aimed to assess whether cTFC >25, a cut-off value in the guidelines, was diagnostic of the presence of CMD. Of the 137 patients, 34 (24.8%) and 32 (23.3%) had cTFC >25 and CMD, respectively. The rate of CMD was not significantly different between patients with and without cTFC >25. cTFC was weakly correlated with at rest and hyperemic mean transit time and IMR, whereas no significant correlation was observed between cTFC and CFR. The receiver operating characteristic curve analysis showed the poor diagnostic ability of cTFC for abnormal CFR and IMR and the presence of CMD. In conclusion, in patients without epicardial coronary lesions, cTFC as a continuous value and with the cut-off value of 25 was not diagnostic of abnormal CFR and IMR and the presence of CMD. Our results did not support the use of cTFC in CMD evaluation.
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Affiliation(s)
- Tatsuro Yamazaki
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yuichi Saito
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan..
| | - Daichi Yamashita
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Hideki Kitahara
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yoshio Kobayashi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
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Toprak K, Özen K, Memioğlu T, İnanır M, Kaplangöray M, Akyol S, Tascanov MB, Biçer A, Demirbağ R. Comparison of the effect of uric acid/albumin ratio on coronary slow flow with other inflammation-based markers. Biomark Med 2024; 18:25-37. [PMID: 38323551 DOI: 10.2217/bmm-2023-0386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024] Open
Abstract
Background: Many inflammation-based markers (IBMs) have been shown to be closely related to coronary slow flow (CSF), but the effect of the uric acid/albumin ratio (UAR) on CSF and its relationship with other IBMs are not clearly known. In this study, we aimed to compare the effects of UAR and other IBMs on CSF. Methods: After the exclusion criteria, 126 patients with CSF detected on coronary angiography and 126 subjects with normal coronary flow as the control group were included in the study. Results: UAR was determined as an independent predictor for CSF. In addition, the UAR was superior to other IBMs in detecting CSF (p < 0.05 for all). Conclusion: This study is the first to investigate the effect of UAR on CSF in comparison with other IBMs.
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Affiliation(s)
- Kenan Toprak
- Harran University, Faculty of Medicine, Department of Cardiology, Sanliurfa, 63050, Turkey
| | - Kaya Özen
- Gazi Yaşargil Training & Research Hospital, Department of Cardiology, Diyarbakır, 21010, Turkey
| | - Tolga Memioğlu
- Abant Izzet Baysal University, Medical Faculty, Department of Cardiology, Bolu, 14300, Turkey
| | - Mehmet İnanır
- Abant Izzet Baysal University, Medical Faculty, Department of Cardiology, Bolu, 14300, Turkey
| | - Mustafa Kaplangöray
- Şeyh Edebali University, Medical Faculty, Department of Cardiology, Bilecik, 11230, Turkey
| | - Selahattin Akyol
- Kartal Kosuyolu High Specialization Training & Research Hospital, Department of Cardiology, İstanbul, 34865, Turkey
| | - Mustafa B Tascanov
- Harran University, Faculty of Medicine, Department of Cardiology, Sanliurfa, 63050, Turkey
| | - Asuman Biçer
- Harran University, Faculty of Medicine, Department of Cardiology, Sanliurfa, 63050, Turkey
| | - Recep Demirbağ
- Harran University, Faculty of Medicine, Department of Cardiology, Sanliurfa, 63050, Turkey
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Mohammed AQ, Abdu FA, Liu L, Yin G, Mareai RM, Mohammed AA, Xu Y, Che W. Coronary microvascular dysfunction and myocardial infarction with non-obstructive coronary arteries: Where do we stand? Eur J Intern Med 2023; 117:8-20. [PMID: 37482469 DOI: 10.1016/j.ejim.2023.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/15/2023] [Accepted: 07/11/2023] [Indexed: 07/25/2023]
Abstract
In the past decade, scientific and clinical research has provided a translational perspective on myocardial infarction (MI) with non-obstructive coronary arteries (MINOCA). MINOCA is characterized by clinical documentation of an acute MI but angiography shows no significant coronary artery obstruction (stenosis <50%). The prevalence of MINOCA is estimated to range from approximately 6 to 10% among MI patients, and those with this condition have a poor prognosis, experiencing high rates of mortality, rehospitalization, and socioeconomic burden. MINOCA represents a major unmet need in cardiovascular medicine, with uncertain clinical management. It is a complex condition that can be caused by various factors, including atherosclerosis, plaque rupture, coronary vasospasm, and microvascular dysfunction. Effective management of MINOCA depends on identifying the underlying mechanism of the infarction, thus a systematic diagnostic approach is recommended. Contemporary data shows that a significant number of patients exhibit structural and functional abnormalities in coronary microcirculation, which is referred to as coronary microvascular dysfunction (CMD). CMD plays a crucial role in patients with signs and symptoms of myocardial ischemia and non-obstructive coronary artery stenosis, including MINOCA. Furthermore, conducting a thorough evaluation of coronary function can have significant prognostic and therapeutic implications, since personalized patient management strategies based on this assessment have been shown to improve symptoms and prognosis. Therefore, an accurate and timely diagnosis of CMD is essential for effective patient management, which can be achieved through various invasive and non-invasive methods. This review will discuss the pathophysiological understanding, current diagnostic techniques, and management strategies of patients with MINOCA and CMD.
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Affiliation(s)
- Abdul-Quddus Mohammed
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Fuad A Abdu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Lu Liu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Guoqing Yin
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Redhwan M Mareai
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ayman A Mohammed
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yawei Xu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Wenliang Che
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Department of Cardiology, Shanghai Tenth People's Hospital Chongming Branch, Shanghai, China.
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Takahashi T, Gupta A, Samuels BA, Wei J. Invasive Coronary Assessment in Myocardial Ischemia with No Obstructive Coronary Arteries. Curr Atheroscler Rep 2023; 25:729-740. [PMID: 37682498 PMCID: PMC10564835 DOI: 10.1007/s11883-023-01144-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/21/2023] [Indexed: 09/09/2023]
Abstract
PURPOSE OF REVIEW The purpose of this review is threefold: (i) to give an overview of well-established invasive methods for assessing patients with ischemia with no obstructive coronary arteries (INOCA) in the cardiac catheterization laboratory; (ii) to describe the prognostic and treatment implications based on these findings, and (iii) to discuss current knowledge gaps and future perspectives. RECENT FINDINGS Recent studies have demonstrated that invasive coronary function testing not only allows for risk stratification of patients with INOCA but also guides medical therapy with improvement in symptoms and quality of life. Based on these findings, invasive coronary function assessment is now a class 2a recommendation in the 2021 ACC/AHA chest pain guideline to improve the diagnosis of coronary microvascular dysfunction and to enhance risk stratification. Invasive functional testing for patients with INOCA is well established and easily performed in the catheterization laboratory. Comprehensive invasive assessment is a key to differentiating INOCA endotypes and optimizing both medical therapy and preventive strategies including lifestyle modification.
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Affiliation(s)
| | - Aakriti Gupta
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Bruce A Samuels
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Janet Wei
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA.
- Barbra Streisand Women's Heart Center, Smidt Heart Institute, Cedars-Sinai Medical Center, 127 S San Vicente Blvd A3212, Los Angeles, CA, 90048, USA.
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Oksen D, Aslan M, Ozmen E, Yavuz YE. Ranolazine improved left ventricular diastolic functions and ventricular repolarization indexes in patients with coronary slow flow. Front Cardiovasc Med 2023; 10:1207580. [PMID: 37671136 PMCID: PMC10475721 DOI: 10.3389/fcvm.2023.1207580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 08/09/2023] [Indexed: 09/07/2023] Open
Abstract
Introduction Coronary slow flow (CSF) is a condition commonly encountered during angiography. Recent studies have shown the adverse effects of CSF on left ventricular diastolic functions. CSF reportedly increases the novel ventricular repolarization parameters. Ranolazine is a preparation with a prominent anti-anginal activity that has positive effects on anti-arrhythmic and diastolic parameters. In this context, this study was carried out to investigate the effects of ranolazine on left ventricular diastolic functions and repolarization in patients with CSF. Material and methods Forty-six patients with CSF and 29 control subjects were included in the patient and control groups, respectively. Both groups received ranolazine for one month and were evaluated using 12-lead electrocardiography, conventional echocardiography, and tissue Doppler imaging at the baseline and after one month of ranolazine treatment. Results Corrected P, QT dispersion, and Tp-e interval values were significantly higher in the patient group than in the control group. There was a significant decrease in isovolumic relaxation time (IVRT) and deceleration time (DT) values after the ranolazine treatment compared to the baseline values in the patient group but not the control group. A significant increase was observed in the mean E and A velocities and the mean E/A ratio after the ranolazine treatment compared to the baseline values in the patient group. Additionally, there was a significant difference between the Tp-e interval and corrected P dispersion values measured after the ranolazine treatment compared to the baseline values in the patient group but not in the control group. Conclusion This study's findings demonstrated that ranolazine positively affected impaired diastolic functions and repolarization parameters, particularly in patients with CSF.
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Affiliation(s)
- Dogac Oksen
- Department of Cardiology, Faculty of Medicine, Altınbaş University, Istanbul, Türkiye
| | - Muzaffer Aslan
- Department of Cardiology, Faculty of Medicine, Siirt University, Siirt, Türkiye
| | - Emre Ozmen
- Department of Cardiology, Faculty of Medicine, Siirt University, Siirt, Türkiye
| | - Yunus Emre Yavuz
- Department of Cardiology, Faculty of Medicine, Siirt University, Siirt, Türkiye
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Aksoy S, Öz D, Öz M, Agirbasli M. Predictors of Long-Term Mortality in Patients with Stable Angina Pectoris and Coronary Slow Flow. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:medicina59040763. [PMID: 37109721 PMCID: PMC10144203 DOI: 10.3390/medicina59040763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 04/09/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023]
Abstract
Background and Objectives: Coronary slow flow (CSF) is an angiographic phenomenon characterized by the slow progression of an injected contrast agent during diagnostic coronary angiography in the absence of significant stenosis. Although CSF is a common angiographic finding, the long-term outcomes and mortality rates are still unknown. This study aimed to investigate the underlying causes of mortality over a 10-year period in patients diagnosed with stable angina pectoris (SAP) and CSF. Materials and Methods: This study included patients with SAP who underwent coronary angiography from 1 January 2012 to 31 December 2012. All patients displayed CSF despite having angiographically normal coronary arteries. Hypertension (HT), diabetes mellitus (DM), hyperlipidaemia, medication compliance, comorbidities, and laboratory data were recorded at the time of angiography. Thrombolysis in myocardial infarction (TIMI) frame count (TFC) was calculated for each patient. The cardiovascular (CV) and non-CV causes of long-term mortality were assessed. Results: A total of 137 patients with CSF (93 males; mean age: 52.2 ± 9.36 years) were included in this study. Twenty-one patients (15.3%) died within 10 years of follow-up. Nine (7.2%) and 12 (9.4%) patients died of non-CV and CV causes, respectively. Total mortality in patients with CSF was associated with age, HT, discontinuation of medications, and high-density lipoprotein cholesterol (HDL-C) levels. The mean TFC was associated with CV mortality. Conclusion: Patients with CSF exhibited a notable increase in cardiovascular-related and overall mortality rates after 10 years of follow-up. HT, discontinuation of medications, HDL-C levels, and mean TFC were associated with mortality in patients with CSF.
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Affiliation(s)
- Sukru Aksoy
- Department of Cardiology, Dr. Siyami Ersek Training and Research Hospital, University of Health Sciences, Istanbul 34668, Turkey
| | - Dilaver Öz
- Department of Cardiology, Dr. Siyami Ersek Training and Research Hospital, University of Health Sciences, Istanbul 34668, Turkey
| | - Melih Öz
- Department of Cardiology, Dr. Siyami Ersek Training and Research Hospital, University of Health Sciences, Istanbul 34668, Turkey
| | - Mehmet Agirbasli
- Department of Cardiology, Faculty of Medicine, Medeniyet University, Istanbul 34722, Turkey
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Semerdzhieva NE, Denchev SV. Positive Stress Electrocardiography in Patients With Non-obstructive Coronary Disease. Cureus 2023; 15:e35549. [PMID: 37007366 PMCID: PMC10058447 DOI: 10.7759/cureus.35549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/27/2023] [Indexed: 03/03/2023] Open
Abstract
Introduction The episodes of myocardial ischemia in patients with non-obstructive coronary disease are extremely variable in provoking factors and presentation. Purpose We investigated the significance of coronary blood flow velocity and epicardial diameter as correlates of a positive electrocardiographic exercise stress test (ExECG) in hospitalized patients with unstable angina and non-obstructive coronary artery disease. Methods The study was a single-center cohort retrospective. ExECG was performed and analyzed in a group of 79 patients with non-obstructive coronary disease (coronary stenoses < 50%). Thirty-one percent of the patients (n=25) were diagnosed with slow coronary flow phenomenon, SCFP; 40.5% (n=32) - patients with hypertensive disease, left ventricular hypertrophy (LVH), and slow epicardial flow; 27.8% (n=22) with hypertension, left ventricular hypertrophy and normal coronary flow. The patients were hospitalized in University Hospital "Alexandrovska," Sofia in the period 2006-2008. Results The frequency of positive ExECG is increased as a trend was associated with smaller epicardial diameters and pronounced delay in epicardial coronary flow. In the subgroup with SCFP, the risk for a positive ExECG test was determined by slower coronary flow (36.5±7.7 frames vs. 30.3±4.4 frames, p=0.044) and borderline significant by epicardial lumen diameters (3.3±0.8 mm vs. 4.1±1.0 mm, p=0.051) and greater myocardial mass (92.8±12.6 g/m2 vs. 82.9±8.6 g/m2, p=0.054). In cases of left ventricular hypertrophy, which included both patients with the normal and slow epicardial flow, there were no statistically significant correlates of an abnormal exercise stress ECG test. Conclusions In patients with non-obstructive coronary atherosclerosis and predominantly slow epicardial coronary flow, the provoking of ischemia at an electrocardiographic exercise stress test is associated with the lower epicardial flow velocity at rest and with the smaller epicardial diameter. In SCFP, the risk for an abnormal stress test is determined by slower coronary flow, smaller epicardial lumen diameter, and greater myocardial mass. The presence and size of the plaque burden are not associated with a greater risk of a positive ExECG in these patients.
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Dutta U, Sinha A, Demir OM, Ellis H, Rahman H, Perera D. Coronary Slow Flow Is Not Diagnostic of Microvascular Dysfunction in Patients With Angina and Unobstructed Coronary Arteries. J Am Heart Assoc 2022; 12:e027664. [PMID: 36565193 PMCID: PMC9973578 DOI: 10.1161/jaha.122.027664] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Background Guidelines recommend that coronary slow flow phenomenon (CSFP), defined as corrected thrombolysis in myocardial infarction frame count (CTFC) >$$ > $$27, can diagnose coronary microvascular dysfunction (CMD) in patients with angina and nonobstructed coronary arteries. CSFP has also historically been regarded as a sign of coronary endothelial dysfunction (CED). We sought to validate the utility of CTFC, as a binary classifier of CSFP and as a continuous variable, to diagnose CMD and CED. Methods and Results Patients with angina and nonobstructed coronary arteries had simultaneous coronary pressure and flow velocity measured using a dual sensor-tipped guidewire during rest, adenosine-mediated hyperemia, and intracoronary acetylcholine infusion. CMD was defined as the inability to augment coronary blood flow in response to adenosine (coronary flow reserve <2.5) and CED in response to acetylcholine (acetylcholine flow reserve ≤1.5); 152 patients underwent assessment using adenosine, of whom 82 underwent further acetylcholine testing. Forty-six patients (30%) had CSFP, associated with lower flow velocity and higher microvascular resistance as compared with controls (16.5±$$ \pm $$6.9 versus 20.2±$$ \pm $$6.9 cm/s; P=0.001 and 6.26±$$ \pm $$1.83 versus 5.36±$$ \pm $$1.83 mm Hg/cm/s; P=0.009, respectively). However, as a diagnostic test, CSFP had poor sensitivity and specificity for both CMD (26.7% and 65.2%) and CED (21.1% and 56.0%). Furthermore, on receiver operating characteristics analyses, CTFC could not predict CMD or CED (area under the curve, 0.41 [95% CI, 0.32%-0.50%] and 0.36 [95% CI, 0.23%-0.49%], respectively). Conclusions In patients with angina and nonobstructed coronary arteries, CSFP and CTFC are not diagnostic of CMD or CED. Guidelines supporting the use of CTFC in the diagnosis of CMD should be revisited.
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Affiliation(s)
- Utkarsh Dutta
- School of Cardiovascular Medicine and SciencesBritish Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre, King’s College LondonLondonUK
| | - Aish Sinha
- School of Cardiovascular Medicine and SciencesBritish Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre, King’s College LondonLondonUK
| | - Ozan M. Demir
- School of Cardiovascular Medicine and SciencesBritish Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre, King’s College LondonLondonUK
| | - Howard Ellis
- School of Cardiovascular Medicine and SciencesBritish Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre, King’s College LondonLondonUK
| | - Haseeb Rahman
- School of Cardiovascular Medicine and SciencesBritish Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre, King’s College LondonLondonUK
| | - Divaka Perera
- School of Cardiovascular Medicine and SciencesBritish Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre, King’s College LondonLondonUK
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13
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Caiati C, Iacovelli F, Mancini G, Lepera ME. Hidden Coronary Atherosclerosis Assessment but Not Coronary Flow Reserve Helps to Explain the Slow Coronary Flow Phenomenon in Patients with Angiographically Normal Coronary Arteries. Diagnostics (Basel) 2022; 12:diagnostics12092173. [PMID: 36140575 PMCID: PMC9497914 DOI: 10.3390/diagnostics12092173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/27/2022] [Accepted: 08/31/2022] [Indexed: 11/16/2022] Open
Abstract
The significance of the slow coronary flow phenomenon (SCFph), as visualized in patients (pts) with angiographically normal coronary arteries, is controversial. Absolute coronary flow reserve (CFR) in the left anterior descending coronary artery (LAD), non-invasively assessed by a transthoracic color-guided pulsed-wave Doppler (E-Doppler TTE), is a reliable parameter to assess coronary microcirculatory dysfunction (CMD). Mild and angiographically hidden epicardial atherosclerosis (Hath), as visualized by intracoronary ultrasound (IVUS), which could be the clue to atherosclerotic coronary microvascular involvement, has never been investigated together with CFR in patients. This study was aimed at assessing the value of CFR and HA in explaining the SCFph. Methods. Both non-invasive assessment of CFR in the LAD and corrected TIMI frame count assessment of the coronary contrast runoff were performed in 124 pts with angiographically normal coronary arteries. Among the whole group, 32 patients also underwent intracoronary ultrasounds in the LMCA and LAD, and the maximal plaque burden was assessed (Lesion external elastic (EEM) cross sectional area (CSA)—Lesion Lumen CSA/Lesion EEM CSA * 100). We found that 24 of the 124 pts (group 1) had the SCFph and the remaining 100 had a normal runoff (group 2). CFR, evaluated in both groups, was not significantly different, being 2.79 ± 0.79 (Mean ± SD) in group 1 and 2.90 ± 0.8 in group 2 (p = ns); in the pts also examined by IVUS (32 pts), the SCFph was always associated with hidden atherosclerosis, and a plaque burden of ≥33%. On the contrary, in the normal runoff group, any grade of PB was observed (from no athero to a PB > 70%) and remarkably, 10 pts had no signs of athero or just a minimal plaque burden. This resulted in a ROC curve analysis in which PB < 33% had a high negative predictive value (100%) in ruling out the SCFph. In addition, considering a CFR value < 2.21 as an index of coronary microcirculatory dysfunction, we found CMD in 15 pts (15%) in group 1 and in 7 pts (29%) in group 2 (p = ns). In conclusion, the SCFph is strongly connected to epicardial athero to the extent that the absence of hidden coronary athero has a very high negative predictive power in ruling out SCFph. CFR that is based on an endothelium-independent mechanism remains fairly normal in this condition. An endothelium-dependent microcirculatory constriction at rest due to atherosclerotic involvement of the coronary microvascular network is a possible explanation of the SCFph.
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Affiliation(s)
- Carlo Caiati
- Correspondence: ; Tel.: +39-080-5592117; Fax: +39-080-5478796
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14
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Markousis-Mavrogenis G, Bacopoulou F, Mavragani C, Voulgari P, Kolovou G, Kitas GD, Chrousos GP, Mavrogeni SI. Coronary microvascular disease: The "Meeting Point" of Cardiology, Rheumatology and Endocrinology. Eur J Clin Invest 2022; 52:e13737. [PMID: 34939183 DOI: 10.1111/eci.13737] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/19/2021] [Accepted: 12/20/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Exertional chest pain/dyspnea or chest pain at rest are the main symptoms of coronary artery disease (CAD), which are traditionally attributed to insufficiency of the epicardial coronary arteries. However, 2/3 of women and 1/3 of men with angina and 10% of patients with acute myocardial infarction have no evidence of epicardial coronary artery stenosis in X-ray coronary angiography. In these cases, coronary microvascular disease (CMD) is the main causative factor. AIMS To present the pathophysiology of CMD in Cardiology, Rheumatology and Endocrinology. MATERIALS-METHODS The pathophysiology of CMD in Cardiology, Rheumatology and Endocrinology was evaluated. It includes impaired microvascular vasodilatation, which leads to inability of the organism to deal with myocardial oxygen needs and, hence, development of ischemic pain. CMD, observed in inflammatory autoimmune rheumatic and endocrine/metabolic disorders, brings together Cardiology, Rheumatology and Endocrinology. Causative factors include persistent systemic inflammation and endocrine/metabolic abnormalities influencing directly the coronary microvasculature. In the past, the evaluation of microcirculation was feasible only with the use of invasive techniques, such as coronary flow reserve assessment. Currently, the application of advanced imaging modalities, such as cardiovascular magnetic resonance (CMR), can evaluate CMD non-invasively and without ionizing radiation. RESULTS CMD may present with a variety of symptoms with 1/3 to 2/3 of them expressed as typical chest pain in effort, more commonly found in women during menopause than in men. Atypical presentation includes chest pain at rest or exertional dyspnea,but post exercise symptoms are not uncommon. The treatment with nitrates is less effective in CMD, because their vasodilator action in coronary micro-circulation is less pronounced than in the epicardial coronary arteries. DISCUSSION Although both classic and new medications have been used in the treatment of CMD, there are still many questions regarding both the pathophysiology and the treatment of this disorder. The potential effects of anti-rheumatic and endocrine medications on the evolution of CMD need further evaluation. CONCLUSION CMD is a multifactorial disease leading to myocardial ischemia/fibrosis alone or in combination with epicardial coronary artery disease. Endothelial dysfunction/vasospasm, systemic inflammation, and/or neuroendocrine activation may act as causative factors and bring Cardiology, Rheumatology and Endocrinology together. Currently, the application of advanced imaging modalities, and specifically CMR, allows reliable assessment of the extent and severity of CMD. These measurements should not be limited to "pure cardiac patients", as it is known that CMD affects the majority of patients with autoimmune rheumatic and endocrine/metabolic disorders.
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Affiliation(s)
| | - Flora Bacopoulou
- University Research Institute of Maternal and Child Health and Precision Medicine, UNESCO Chair on Adolescent Health Care, National and Kapodistrian University of Athens, Aghia Sophia Children's Hospital, Athens, Greece
| | - Clio Mavragani
- Pathophysiology Department, University of Athens, Athens, Greece
| | | | - Genovefa Kolovou
- Onassis Cardiac Surgery Hospital, Athens, Greece.,Epidemiology Department, University of Manchester, Manchester, UK
| | - George D Kitas
- Epidemiology Department, University of Manchester, Manchester, UK
| | - George P Chrousos
- University Research Institute of Maternal and Child Health and Precision Medicine, UNESCO Chair on Adolescent Health Care, National and Kapodistrian University of Athens, Aghia Sophia Children's Hospital, Athens, Greece
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15
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Evaluate the Correlation between the TIMI Frame Count, IMR, and CFR in Coronary Microvascular Disease. J Interv Cardiol 2022; 2022:6361398. [PMID: 35185397 PMCID: PMC8828352 DOI: 10.1155/2022/6361398] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 12/24/2021] [Indexed: 11/29/2022] Open
Abstract
Objective To evaluate the correlation between the TIMI frame count, IMR, and CFR in coronary microvascular disease (slow flow phenomenon). Methods TFC and IMR were recorded in the nitroglycerin and ATP administration states, and the relationship between TFC, IMR, and CFR in specific states was analyzed. Results A total of 41 patients with baseline TFC >25 frames on coronary angiography were enrolled, and nitroglycerin reduced TFC by 50% from baseline in 24 (58.54%) patients; 16 of the remaining 17 patients were able to achieve a 50% reduction in TFC by further intracoronary ATP injection. 10 patients were further tested for IMR, and the results showed significant correlations between baseline TFC and IMR (r = 0.775, P=0.008), TFC and IMR after nitroglycerin (r = 0.875, P=0.001), and the minimal TFC and IMR that could be obtained with nitroglycerin or ATP administration (r = 0.890, P=0.001). There was also a significant correlation between the proportional improvement in TFC and CFR before and after nitroglycerin injection (r = 0.685, P=0.029). In addition, we observed a lower IMR measured after nitroglycerin than after ATP in three patients, suggesting that CMD may be dominated by NO-sensitive vascular such as prearterioles and that an extensive analysis of the target site of CMD may be achieved by stepwise drug administration. Conclusion Induction of TFC in different states by a stepwise drug approach may serve as a potential primary screening method for coronary microcirculatory dysfunction, thereby reducing the need for further IMR or CFR testing.
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16
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Zalewska-Adamiec M, Kuzma L, Bachorzewska-Gajewska H, Dobrzycki S. Fractional Flow Reserve in the Diagnosis of Ischemic Heart Disease in a Patient with Coronary Artery Ectasia. Diagnostics (Basel) 2021; 12:diagnostics12010017. [PMID: 35054184 PMCID: PMC8774518 DOI: 10.3390/diagnostics12010017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/13/2021] [Accepted: 12/16/2021] [Indexed: 11/25/2022] Open
Abstract
Coronary artery ectasias (CAE) are diffuse dilatations of coronary artery segments with a diameter 1.5 times greater than the largest adjacent normal segment of the vessel. They are found in 0.3–5.0% of coronary angiography. Risk factors for CAE include atherosclerosis, previous percutaneous coronary interventions, arterial inflammation and connective tissue diseases. The diagnosis of CEA in a patient is a considerable diagnostic and therapeutic problem due to the unfavorable prognosis and the lack of guidelines. We present a case of a 69-year-old male patient with a history of retrosternal pain admitted to the clinic for the diagnosis of coronary artery disease. In coronary angiography, numerous ectases of the main coronary arteries and atherosclerotic lesions causing border stenosis of the left anterior descending (LAD), diagonal (2D) and marginal branch (OM). The heart team decided to assess the significance of the changes with the fractional flow reserve (FFR). The FFR was performed and haemodynamically insignificant stenoses of the ectatically dilated coronary arteries were found. The patient was qualified for conservative treatment.
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Affiliation(s)
| | - Lukasz Kuzma
- Department of Invasive Cardiology, Medical University of Bialystok, 15276 Bialystok, Poland
| | - Hanna Bachorzewska-Gajewska
- Department of Invasive Cardiology, Medical University of Bialystok, 15276 Bialystok, Poland
- Department of Clinical Medicine, Medical University of Bialystok, 24A Sklodowskiej-Curie St., 15276 Bialystok, Poland
| | - Slawomir Dobrzycki
- Department of Invasive Cardiology, Medical University of Bialystok, 15276 Bialystok, Poland
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17
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Afsin A, Kaya H, Suner A, Uzel KE, Bursa N, Hosoglu Y, Yavuz F, Asoglu R. Plasma atherogenic indices are independent predictors of slow coronary flow. BMC Cardiovasc Disord 2021; 21:608. [PMID: 34930134 PMCID: PMC8686646 DOI: 10.1186/s12872-021-02432-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 12/13/2021] [Indexed: 11/25/2022] Open
Abstract
Background Although the pathophysiology of coronary slow flow (CSF) has not been fully elucidated, emerging data increasingly support potential role for subclinical diffuse atherosclerosis in the etiology of CSF. We aimed to investigate relationship between atherogenic indices and CSF. Methods 130 patients with CSF diagnosed according to Thrombolysis in Myocardial Infarction (TIMI)-frame count (TFC) method and 130 controls who had normal coronary flow (NCF) were included in this retrospective study. Atherogenic indices (atherogenic index of plasma [AIP], Castelli risk indices I and II [CRI-I and II]) were calculated using conventional lipid parameters. Results The logistic regression analyses demonstrated that AIP (OR, 5.463; 95% confidence interval [CI], 1.357–21.991; p = 0.017) and CRI-II (OR, 1.624; 95% CI, 1.138–2.319; p = 0.008) were independent predictors of CSF. Receiver operating characteristic analysis showed that the optimal cutoff value to predict the occurrence of CSF was 0.66 for AIP (sensitivity, 59%; specificity, 73%; area under curve [AUC], 0.695; p < 0.001) and 3.27 for CRI-II (sensitivity, 60%; specificity, 79%; AUC, 0.726; p < 0.001). Conclusions AIP and CRI-II levels were independent predictors of CSF. Prospective studies in larger cohorts of patients may elucidate the role of atherogenic dyslipidemia in the pathophysiology of CSF.
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Affiliation(s)
- Abdulmecit Afsin
- Department of Cardiology, Adiyaman Training and Research Hospital, Adiyaman, Turkey
| | - Hakan Kaya
- Department of Cardiology, Faculty of Medicine, Adiyaman University, Adiyaman, Turkey.
| | - Arif Suner
- Department of Cardiology, Faculty of Medicine, Adiyaman University, Adiyaman, Turkey
| | - Kader Eliz Uzel
- Department of Cardiology, Adiyaman Training and Research Hospital, Adiyaman, Turkey
| | - Nurbanu Bursa
- Department of Statistics, Faculty of Science, Hacettepe University, Ankara, Turkey
| | - Yusuf Hosoglu
- Department of Cardiology, Adiyaman Training and Research Hospital, Adiyaman, Turkey
| | - Fethi Yavuz
- Department of Cardiology, Faculty of Medicine, Adiyaman University, Adiyaman, Turkey
| | - Ramazan Asoglu
- Department of Cardiology, Adiyaman Training and Research Hospital, Adiyaman, Turkey
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18
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Nef HM, Achenbach S, Birkemeyer R, Bufe A, Dörr O, Elsässer A, Gaede L, Gori T, Hoffmeister HM, Hofmann FJ, Katus HA, Liebetrau C, Massberg S, Pauschinger M, Schmitz T, Süselbeck T, Voelker W, Wiebe J, Zahn R, Hamm C, Zeiher AM, Möllmann H. Manual der Arbeitsgruppe Interventionelle Kardiologie (AGIK) der Deutschen Gesellschaft für Kardiologie – Herz- und Kreislaufforschung e. V. (DGK). DER KARDIOLOGE 2021. [PMCID: PMC8319902 DOI: 10.1007/s12181-021-00493-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Dieses Manual zur diagnostischen Herzkatheteruntersuchung (Teil 1) ist eine Anwendungsempfehlung für interventionell tätige Ärzte, die den gegenwärtigen Kenntnisstand unter Berücksichtigung neuester Studienergebnisse wiedergibt. Hierzu wurde in den einzelnen Kapiteln speziell auf die Alltagstauglichkeit der Empfehlungen geachtet, sodass dieses Manual jedem interventionell tätigen Kardiologen als Entscheidungshilfe im Herzkatheterlabor dienen soll. Trotz der von vielen Experten eingebrachten praktischen Hinweise kann dieses Manual dennoch nicht die ärztliche Evaluation des individuellen Patienten ersetzen und damit eine Anpassung der Diagnostik bzw. Therapie ersetzen.
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Affiliation(s)
- Holger M. Nef
- Medizinische Klinik I, Kardiologie und Angiologie, Universitätsklinikum Gießen und Marburg GmbH, Klinikstr. 33, 35392 Gießen, Deutschland
| | - Stephan Achenbach
- Medizinische Klinik 2, Friedrich-Alexander-Universität Erlangen Nürnberg, Erlangen, Deutschland
| | | | - Alexander Bufe
- Medizinische Klinik I, Helios Klinikum Krefeld, Krefeld, Deutschland
- Universität Witten/Herdecke, Witten, Deutschland
| | - Oliver Dörr
- Medizinische Klinik I, Kardiologie und Angiologie, Universitätsklinikum Gießen und Marburg GmbH, Klinikstr. 33, 35392 Gießen, Deutschland
| | - Albrecht Elsässer
- Herz- Kreislauf-Zentrum, Universitätsklinik für Innere Medizin – Kardiologie, Klinikum Oldenburg, Oldenburg, Deutschland
| | - Luise Gaede
- Medizinische Klinik 2, Friedrich-Alexander-Universität Erlangen Nürnberg, Erlangen, Deutschland
| | - Tommaso Gori
- Zentrum für Kardiologie – Kardiologie I, Universitätsmedizin Mainz, Mainz, Deutschland
- Standort Rhein-Main, DZHK, Frankfurt am Main, Deutschland
| | - Hans M. Hoffmeister
- Klinik für Kardiologie und allgemeine Innere Medizin, Städtisches Klinikum Solingen gemeinnützige GmbH, Solingen, Deutschland
| | - Felix J. Hofmann
- Medizinische Klinik I, Kardiologie und Angiologie, Universitätsklinikum Gießen und Marburg GmbH, Klinikstr. 33, 35392 Gießen, Deutschland
| | - Hugo A. Katus
- Klinik für Innere Medizin III (Kardiologie, Angiologie, Pneumologie), Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - Christoph Liebetrau
- Standort Rhein-Main, DZHK, Frankfurt am Main, Deutschland
- Abteilung für Kardiologie, Campus der JLU, Kerkhoff Bad Nauheim, Bad Nauheim, Deutschland
- CCB – Cardioangiologisches Centrum Bethanien, Frankfurt am Main, Deutschland
| | - Steffen Massberg
- Medizinische Klinik und Poliklinik I, Klinikum der Universität München, München, Deutschland
| | - Matthias Pauschinger
- Klinik für Innere Medizin 8, Schwerpunkt Kardiologie, Universitätsklinik der Paracelsus Medizinischen Privatuniversität, Nürnberg, Deutschland
| | - Thomas Schmitz
- Klinik für Kardiologie und Angiologie, Contilia Herz- und Gefäßzentrum, Essen, Deutschland
| | - Tim Süselbeck
- Kardiologische Praxisklinik Ludwigshafen, Ludwigshafen, Deutschland
| | - Wolfram Voelker
- Medizinische Klinik und Poliklinik, Universitätsklinikum Würzburg, Würzburg, Deutschland
| | - Jens Wiebe
- Klinik für Herz- und Kreislauferkrankungen, Deutsches Herzzentrum München, München, Deutschland
| | - Ralf Zahn
- Medizinische Klinik B, Klinikum der Stadt Ludwigshafen am Rhein gemeinnützige GmbH, Ludwigshafen, Deutschland
- Kommission für Klinische Kardiovaskuläre Medizin, Deutsche Gesellschaft für Kardiologie, Düsseldorf, Deutschland
| | - Christian Hamm
- Medizinische Klinik I, Kardiologie und Angiologie, Universitätsklinikum Gießen und Marburg GmbH, Klinikstr. 33, 35392 Gießen, Deutschland
| | - Andreas M. Zeiher
- Klinik für Kardiologie, Angiologie und Nephrologie, Universitätsklinik Frankfurt, Frankfurt, Deutschland
| | - Helge Möllmann
- Klinik für Innere Medizin I, St.-Johannes-Hospital Dortmund, Dortmund, Deutschland
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19
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Javadi DH, Sotudeh DS, Javadi DA, Rezaee DM, Hajikarimi DM. Echocardiographic Evaluation of Left and Right Ventricular Function in Patients with Coronary Slow Flow Syndrome: A Comparative Study. Curr Probl Cardiol 2021; 47:100925. [PMID: 34364691 DOI: 10.1016/j.cpcardiol.2021.100925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 06/21/2021] [Indexed: 11/03/2022]
Abstract
The Coronary Slow Flow Phenomenon is a syndrome of normal coronary anatomy and delayed progression of contrast medium through the coronary vessels. This research attempts to analyze and compare the systolic and diastolic function of the left and right ventricle in primary Slow Flow and Normal Coronary Flow.Two groups of primary Slow Coronary Flow (33 people) and Normal Coronary Flow (11 people) were included and the systolic and diastolic function of the ventricles was analyzed and compared between them.In the control group 18% of patients had mild and in the case group 24.2% mild, and 3.1% had moderate left ventricular diastolic dysfunction (P >0.05). The frequency distribution of the left and right ventricular systolic dysfunction was similar in the two groups.There was no statistically significant difference between two groups and in the association of cardiac dysfunction, it may be reasonable to investigate other causes.
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Affiliation(s)
- Dr Hamidreza Javadi
- Department of Cardiology, School of Medicine, Qazvin University of Medical Sciences, Qazvin, Iran.
| | | | - Dr Amir Javadi
- Department of Social Medicine, School of Medicine, Qazvin University of Medical Sciences, Qazvin, Iran; Medical Microbiology Research Center, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Dr Mahdokht Rezaee
- Department of Cardiology, School of Medicine, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Dr Majid Hajikarimi
- Department of Cardiology, School of Medicine, Qazvin University of Medical Sciences, Qazvin, Iran
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20
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Kaplan M, Abacıoğlu ÖÖ, Yavuz F, Kaplan GI, Topuz M. Slow Flow Phenomenon Impairs the Prognosis of Coronary Artery Ectasia as Well as Coronary Atherosclerosis. Braz J Cardiovasc Surg 2021; 36:346-353. [PMID: 34236824 PMCID: PMC8357380 DOI: 10.21470/1678-9741-2020-0618] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Introduction: Coronary artery ectasia (CAE) is one of the uncommon cardiovascular disorders and its prognosis is still debated. Objective: We aimed to review long-term follow-up data in patients with CAE and to evaluate the prognosis of CAE patients with coronary slow flow phenomenon (CSFP). Methods: This study had a prospective design and 143 patients with CAE were included. The angiographic and demographic characteristics were reviewed in detail. The patients were categorized, based on concomitant coronary artery stenosis detected by angiography, as CCAE group (n=87, ≥30% luminal stenosis) and ICAE group (n=56, <30% luminal stenosis) and also categorized by the coronary flow as CSFP group (n=51) and normal flow coronary ectasia - NCEA group (n=92). All patients were re-evaluated at 6-month intervals. Follow-up data, cardiovascular (CV) mortality, hospitalization and major adverse cardiac events (MACE) were collected. The level of statistical significance was set at 5%. Results: Patients were followed up for an average of 56.9±7.4 months. During the follow-up, statistically significant differences were found in hospitalization, CV mortality and MACE between the CCAE and ICAE groups (P=0.038, P=0.003, P=0.001, respectively). The CSFP and NCEA groups were also compared. There was a statistical difference with respect to hospitalization between the CFSP and NCEA groups (P=0.001), but no difference was observed in terms of MACE and CV mortality (P=0.793 and P=0.279). Conclusion: CSFP accompanying CAE may be a predictor of hospitalization. Significant atherosclerotic plaques coexisting with CAE may be predictive for MACE.
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Affiliation(s)
- Mehmet Kaplan
- Department of Cardiology, Gaziantep University, Gaziantep, Turkey
| | - Özge Özcan Abacıoğlu
- Department of Cardiology, Adana City Training & Research Hospital, Adana, Turkey
| | - Fethi Yavuz
- Department of Cardiology, Adana City Training & Research Hospital, Adana, Turkey
| | - Gizem Ilgın Kaplan
- Department of Internal Medicine, Ersin Arslan Training & Research Hospital, Gaziantep, Turkey
| | - Mustafa Topuz
- Department of Cardiology, Adana City Training & Research Hospital, Adana, Turkey
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21
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Affiliation(s)
- Michael Y Henein
- Institute of Public Health and Clinical Medicine, 8075Umea University, Sweden.,Brunel University, Middlesex, United Kingdom.,St George's University London, United Kingdom
| | - Federico Vancheri
- Department of Internal Medicine, S. Elia Hospital, Caltanissetta, Italy
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22
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Chalikias G, Tziakas D. Slow Coronary Flow: Pathophysiology, Clinical Implications, and Therapeutic Management. Angiology 2021; 72:808-818. [PMID: 33779300 DOI: 10.1177/00033197211004390] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Coronary slow flow (CSF) is an angiographic phenomenon with specific epidemiologic characteristics, associated clinical presentation, and prognosis. Although patients with CSF are diagnosed as having "normal coronary arteries," it seems appropriate to consider CSF as a distinct disease entity requiring specific treatment. The patient with CSF is usually male, smoker, obese, with a constellation of risk factors suggestive of metabolic syndrome. Unstable angina is the most common clinical presentation, with recurrent episodes of chest pain at rest associated with electrocardiographic changes often requiring readmission and reevaluation. Regarding definition and diagnosis, interventionists should first exclude possible "secondary" causes of CSF, use objective means for definition and then differentiate from other similar conditions such as microvascular angina. Although the phenomenon is generally benign, patients with CSF are severely symptomatic with recurrent episodes of chest pain and poor quality of life. Furthermore, acute presentation of the phenomenon is commonly life-threatening with ventricular tachyarrhythmias, conduction abnormalities, or cardiogenic shock. Acute treatment of CSF includes, but is not restricted to, intracoronary infusion of dipyridamole, adenosine, or atropine. Chronic management of patients with CSF encompasses dipyridamole, diltiazem, nebivolol, telmisartan, and/or atorvastatin associated with amelioration of angina symptoms, improved quality of life, and good prognosis.
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Affiliation(s)
- George Chalikias
- Cardiology Department, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
| | - Dimitrios Tziakas
- Cardiology Department, Medical School, Democritus University of Thrace, Alexandroupolis, Greece
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Zengin A, Karaca M, Aruğaslan E, Yıldırım E, Karataş MB, Çanga Y, Emre A, Tayyareci G. Performance of neutrophil to lymphocyte ratio for the prediction of long-term morbidity and mortality in coronary slow flow phenomenon patients presented with non-ST segment elevation acute coronary syndrome. J Cardiovasc Thorac Res 2021; 13:125-130. [PMID: 34326966 PMCID: PMC8302892 DOI: 10.34172/jcvtr.2021.12] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 12/18/2020] [Indexed: 12/05/2022] Open
Abstract
Introduction: In this study, we aimed to determine if neutrophil to lymphocyte ratio could predict long term morbidity and mortality in patients who hospitalized for non-ST segment elevation acute coronary syndrome (NSTE-ACS) and had coronary slow flow on coronary angiography. Methods: In this observational study, 111 patients who presented with NSTE-ACS and diagnosed with coronary slow flow phenomenon on angiographic examination were included. Neutrophil to lymphocyte ratio (NLR) calculated as the ratio of the number of neutrophils to the number of lymphocytes. Patients classified into three groups according to NLR values. The term coronary slow flow phenomenon was depicted by calculating Thrombolysis in Myocardial Infarction frame count.Patients were followed up and the occurrence of recurrent angina, recurrent myocardial infarction, and long-term mortality was determined using medical records, phone calls, or face-to-face interviews. P values <0.05 considered to indicate statistical significance. Results: Recurrent angina and myocardial infarction occurred more frequently in the highest NLR tertile compared with middle and lowest NLR tertiles. High NLR group (NLR≥ 3.88 n=38) was significantly associated with younger age and smoking status. WBC, troponin I and CRP levels increased as the NLR tertile increased. Recurrent myocardial infarction and angina showed strong relationship with increasing NLR values. In multivariate regression analyses smoking and high NLR levels were independent predictors of recurrent myocardial infarction (HR:4.64 95%CI 0.95-22.52 P=0.04, HR: 1.48 95%CI 1.16-1.90 P<0.01 respectively) in the long term follow up. Conclusion: Our study demonstrated that high NLR values can be a valuable prognostic tool in the long term follow up of patients who presented with NSTE-ACS and diagnosed with slow flow phenomenon on coronary angiography.
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Affiliation(s)
- Ahmet Zengin
- Department of Cardiology, University of Health Scienses, Dr. Siyami Ersek Training and Research Hospital, Istanbul, Turkey
| | - Mehmet Karaca
- Department of Cardiology, Private Ataşehir Memorial Hospital, Istanbul, Turkey
| | - Emre Aruğaslan
- Department of Cardiology, University of Health Scienses, Bilkent City Hospital, Ankara, Turkey
| | - Ersin Yıldırım
- Department of Cardiology, University of Health Sciences Ümraniye Training and Research Hospital Istanbul, Turkey
| | - Mehmet Baran Karataş
- Department of Cardiology, University of Health Scienses, Dr. Siyami Ersek Training and Research Hospital, Istanbul, Turkey
| | - Yiğit Çanga
- Department of Cardiology, University of Health Scienses, Dr. Siyami Ersek Training and Research Hospital, Istanbul, Turkey
| | - Ayşe Emre
- Department of Cardiology, University of Health Scienses, Dr. Siyami Ersek Training and Research Hospital, Istanbul, Turkey
| | - Gülşah Tayyareci
- Department of Cardiology, University of Health Scienses, Dr. Siyami Ersek Training and Research Hospital, Istanbul, Turkey
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Liu QR, Liu HX, Xing WL, Zhou Q, Zhang HL, Zhang HT, Song GY, Wu YJ. Effect of Danhong Injection () on Improving Coronary Microcirculation Injury after Percutaneous Coronary Intervention. Chin J Integr Med 2021; 27:455-460. [PMID: 33433847 DOI: 10.1007/s11655-021-2853-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/22/2018] [Indexed: 10/22/2022]
Abstract
OBJECTIVE To explore the effectiveness of Danhong Injection () on improving microcirculatory injury after percutaneous coronary intervention (PCI) in patients with coronary heart disease (CHD). METHODS A randomized controlled trial was conducted and 90 patients were enrolled. A random sequence was generated using statistical analysis software. Patients with microcirculatory injuries after PCI were randomly divided into 3 groups for treatment (30 subjects in each group): Danhong Injection group: after PCI, Danghong Injections were given with intravenous administration with 40 mL twice a day for a week; statins intensive group: after PCI, atorvastatin calcium tablets were given oral medication with 80 mg once, and then atorvastatin 40 mg daily for 1 week; the control group: after PCI, atorvastatin calcium tablets were given oral medication with 10-20 mg daily for 1 week. The index of microcirculation resistance (IMR) was used to assess microcirculatory injury during PCI. The IMR of the target vessel was reexamined after 1 week of drug treatment. RESULTS After one week's drug treatment, IMR was significantly decreased in both statins intensive group and Danhong Injection group compared with the control group (P<0.01), but no difference was found between statins intensive group and Danhong injection group (14.03 ± 2.54 vs. 16.03 ± 5.72 U, P=0.080). CONCLUSIONS The efficacy of Danhong Injection is non-inferior to statin. Early use of Danhong Injection after PCI can effectively improve coronary microcirculation injury after PCI.
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Affiliation(s)
- Qing-Rong Liu
- Department of Cardiology, Fuwai Hospital of Chinese Academy of Medical Sciences, Beijing, 100037, China.,Key Laboratory of Cellular Physiology, Ministry of Education (Shanxi Medical University), Taiyuan, China.,Department of Physiology, Shanxi Medical University, Taiyuan, 030001, China
| | - Hong-Xu Liu
- Department of Cardiology, Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital Medical University, Beijing, 100010, China
| | - Wen-Long Xing
- Department of Cardiology, Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital Medical University, Beijing, 100010, China
| | - Qi Zhou
- Department of Cardiology, Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital Medical University, Beijing, 100010, China
| | - Hong-Liang Zhang
- Department of Cardiology, Fuwai Hospital of Chinese Academy of Medical Sciences, Beijing, 100037, China
| | - Hai-Tong Zhang
- Department of Cardiology, Fuwai Hospital of Chinese Academy of Medical Sciences, Beijing, 100037, China
| | - Guang-Yuan Song
- Department of Cardiology, Fuwai Hospital of Chinese Academy of Medical Sciences, Beijing, 100037, China
| | - Yong-Jian Wu
- Department of Cardiology, Fuwai Hospital of Chinese Academy of Medical Sciences, Beijing, 100037, China.
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25
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Association of abnormal coronary sinus reflux with coronary slow flow and importance of the Thebesian valve. Int J Cardiol 2020; 319:26-31. [DOI: 10.1016/j.ijcard.2020.08.073] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 08/17/2020] [Accepted: 08/21/2020] [Indexed: 11/20/2022]
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26
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Vancheri F, Longo G, Vancheri S, Henein M. Coronary Microvascular Dysfunction. J Clin Med 2020; 9:E2880. [PMID: 32899944 PMCID: PMC7563453 DOI: 10.3390/jcm9092880] [Citation(s) in RCA: 148] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/02/2020] [Accepted: 09/02/2020] [Indexed: 01/09/2023] Open
Abstract
Many patients with chest pain undergoing coronary angiography do not show significant obstructive coronary lesions. A substantial proportion of these patients have abnormalities in the function and structure of coronary microcirculation due to endothelial and smooth muscle cell dysfunction. The coronary microcirculation has a fundamental role in the regulation of coronary blood flow in response to cardiac oxygen requirements. Impairment of this mechanism, defined as coronary microvascular dysfunction (CMD), carries an increased risk of adverse cardiovascular clinical outcomes. Coronary endothelial dysfunction accounts for approximately two-thirds of clinical conditions presenting with symptoms and signs of myocardial ischemia without obstructive coronary disease, termed "ischemia with non-obstructive coronary artery disease" (INOCA) and for a small proportion of "myocardial infarction with non-obstructive coronary artery disease" (MINOCA). More frequently, the clinical presentation of INOCA is microvascular angina due to CMD, while some patients present vasospastic angina due to epicardial spasm, and mixed epicardial and microvascular forms. CMD may be associated with focal and diffuse epicardial coronary atherosclerosis, which may reinforce each other. Both INOCA and MINOCA are more common in females. Clinical classification of CMD includes the association with conditions in which atherosclerosis has limited relevance, with non-obstructive atherosclerosis, and with obstructive atherosclerosis. Several studies already exist which support the evidence that CMD is part of systemic microvascular disease involving multiple organs, such as brain and kidney. Moreover, CMD is strongly associated with the development of heart failure with preserved ejection fraction (HFpEF), diabetes, hypertensive heart disease, and also chronic inflammatory and autoimmune diseases. Since coronary microcirculation is not visible on invasive angiography or computed tomographic coronary angiography (CTCA), the diagnosis of CMD is usually based on functional assessment of microcirculation, which can be performed by both invasive and non-invasive methods, including the assessment of delayed flow of contrast during angiography, measurement of coronary flow reserve (CFR) and index of microvascular resistance (IMR), evaluation of angina induced by intracoronary acetylcholine infusion, and assessment of myocardial perfusion by positron emission tomography (PET) and magnetic resonance (CMR).
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Affiliation(s)
- Federico Vancheri
- Department of Internal Medicine, S.Elia Hospital, 93100 Caltanissetta, Italy
| | - Giovanni Longo
- Cardiovascular and Interventional Department, S.Elia Hospital, 93100 Caltanissetta, Italy;
| | - Sergio Vancheri
- Radiology Department, I.R.C.C.S. Policlinico San Matteo, 27100 Pavia, Italy;
| | - Michael Henein
- Institute of Public Health and Clinical Medicine, Umea University, SE-90187 Umea, Sweden;
- Department of Fluid Mechanics, Brunel University, Middlesex, London UB8 3PH, UK
- Molecular and Nuclear Research Institute, St George’s University, London SW17 0RE, UK
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Comparison of Instantaneous Wave-Free Ratio (iFR) and Fractional Flow Reserve (FFR) with respect to Their Sensitivities to Cardiovascular Factors: A Computational Model-Based Study. J Interv Cardiol 2020; 2020:4094121. [PMID: 32508540 PMCID: PMC7240797 DOI: 10.1155/2020/4094121] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 01/18/2020] [Accepted: 02/27/2020] [Indexed: 02/06/2023] Open
Abstract
While coronary revascularization strategies guided by instantaneous wave-free ratio (iFR) are, in general, noninferior to those guided by fractional flow reserve (FFR) with respect to the rate of major adverse cardiac events at one-year follow-up in patients with stable angina or an acute coronary syndrome, the overall accuracy of diagnosis with iFR in large patient cohorts is about 80% compared with the diagnosis with FFR. So far, it remains incompletely understood what factors contribute to the discordant diagnosis between iFR and FFR. In this study, a computational method was used to systemically investigate the respective effects of various cardiovascular factors on FFR and iFR. The results showed that deterioration in aortic valve disease (e.g., regurgitation or stenosis) led to a marked decrease in iFR and a mild increase in FFR given fixed severity of coronary artery stenosis and that increasing coronary microvascular resistance caused a considerable increase in both iFR and FFR, but the degree of increase in iFR was lower than that in FFR. These findings suggest that there is a high probability of discordant diagnosis between iFR and FFR in patients with severe aortic valve disease or coronary microcirculation dysfunction.
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Carvalho FPD, Azevedo CFD. Coronary Slow Flow Phenomenon - Adding Myocardial Fibrosis to the Equation. Arq Bras Cardiol 2020; 114:552-553. [PMID: 32267329 PMCID: PMC7792736 DOI: 10.36660/abc.20200187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Filipe Penna de Carvalho
- Diagnósticos da América SA, Rio de Janeiro, RJ - Brasil
- Américas Serviços Médicos, Rio de Janeiro, RJ - Brasil
| | - Clério Francisco de Azevedo
- Diagnósticos da América SA, Rio de Janeiro, RJ - Brasil
- Duke University Hospital - Medicine/Cardiology, Durham, North Carolina - EUA
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Seyyed-Mohammadzad MH, Rashtchizadeh S, Khademvatani K, Afsargharehbagh R, Nasiri A, Sepehrvand N. Ventricular Dysfunction in Patients with Coronary Slow-Flow Phenomenon: A Single-center Case-control Study. Heart Views 2020; 21:60-64. [PMID: 33014297 PMCID: PMC7507914 DOI: 10.4103/heartviews.heartviews_119_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 08/19/2019] [Indexed: 11/16/2022] Open
Abstract
Background: Coronary slow-flow phenomenon (CSFP), characterized by delayed distal vessel opacification of contrast, in the absence of significant epicardial coronary stenosis, has effects on exercise capacity and clinical outcomes. The aim of this study was to explore the systolic and diastolic function of patients with CSFP and to compare it with a group of controls with normal coronary anatomy and flow. Materials and Methods: In this case–control study, 45 consecutive CSFP patients and 45 age-, body mass index-, and presentation season-matched controls with normal coronary arteries and normal coronary flows were enrolled from Seyyedoshohada Heart Center from March 2015 to March 2016. A transthoracic echocardiography was done by a blinded echocardiographer using both conventional and tissue Doppler imaging techniques. Results: Patients with CSFP were more likely to be male (P = 0.006) and smoker (P = 0.02) compared to controls. Other risk factors were not different between the two groups. There were no differences between groups in terms of the peak early (E) and late (A) diastolic velocities, deceleration time, early (E’) and late (A’) peak diastolic velocities at the mitral annulus, and the systolic mitral annular velocity (S’). Global longitudinal strain and peak systolic strain rates was lower in patients with CSFP compared to controls (−16.7% ±2.4% vs. −18.9% ±1.6%, P < 0.001 and 1.10 ± 0.1 vs. 1.24 ± 0.3, P = 0.008, respectively). Conclusion: Patients with CSFP showed signs of the left ventricular systolic dysfunction in tissue Doppler echocardiography, which underlines the importance of close follow-up in these patients. Patients with CSFP should be screened for ventricular function preferably by tissue Doppler echocardiography.
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Affiliation(s)
| | - Sanam Rashtchizadeh
- Department of Cardiology, Seyyedoshohada Heart Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Kamal Khademvatani
- Department of Cardiology, Seyyedoshohada Heart Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Roghaiyeh Afsargharehbagh
- Department of Cardiology, Seyyedoshohada Heart Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Aliakbar Nasiri
- Department of Anesthesiology, Urmia University of Medical Sciences, Urmia, Iran
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Dorobantu M, Calmac L. Coronary Microcirculatory Dysfunction Evaluation in Chronic Angina. Microcirculation 2020. [DOI: 10.1007/978-3-030-28199-1_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Assessment of the relationship between coronary flow rates and myocardial perfusion abnormality in patients with nonobstructive coronary artery disease: an observational study in cardiac syndrome X and coronary slow flow. Nucl Med Commun 2019; 40:1122-1129. [PMID: 31568270 DOI: 10.1097/mnm.0000000000001080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES In this study, we evaluated and compared the level of myocardial ischaemia caused by cardiac syndrome X (CSX) and coronary slow flow (CSF) with single photon emission computed tomography myocardial perfusion imaging (SPECT-MPI), and determined if changes in the level of myocardial ischaemia exist in CSF and CSX cases according to thrombolysis in myocardial infarction frame count (TFC). MATERIALS AND METHODS The study population consisted of 66 patients with CSF and 78 angiographically normal patients (36 of them with CSX and 42 of them healthy controls). The coronary flow rates of all patients were documented using TFC. Subsequently, all patients were evaluated with SPECT-MPI and categorized into the following groups according to their results: patients with CSF, patients with CSX, and patients with normal coronary arteries. Finally, we investigated whether a relationship existed between the SPECT-MPI and TFC results from these three groups. RESULTS All ischaemia scores for MPI were significantly higher in the CSF group than in the CSX and control groups (P < 0.05). TFC was significantly associated with the severity of ischaemia in the CSF patients. There was a significant positive correlation between the summon difference score (SDS) and mean TFC value (P < 0.05) as well as between the SDS and each individual coronary TFC value in the CSF patients (P < 0.05). The number of vessels involved in CSF was positively correlated with the SDS. CONCLUSION CSF is associated with more severe myocardial ischaemia than CSX. The level of myocardial ischaemia on SPECT-MPI was correlated with the TFC and the number of affected coronary vessels in patients with CSF. These results suggest that CSF is a more serious clinical entity than CSX, and that the clinical severity of CSF appears to increase as the coronary flow rate decreases.
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Elamragy AA, Abdelhalim AA, Arafa ME, Baghdady YM. Anxiety and depression relationship with coronary slow flow. PLoS One 2019; 14:e0221918. [PMID: 31487310 PMCID: PMC6728014 DOI: 10.1371/journal.pone.0221918] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Accepted: 08/19/2019] [Indexed: 11/18/2022] Open
Abstract
Background Psychiatric disorders (depression / anxiety) are linked to coronary artery disease (CAD). Coronary slow flow (CSF) is a relatively common form of CAD with the same underlying mechanisms that are attributed to many anatomic and pathophysiologic factors. However, the relationship between psychiatric disorders and CSF is less well-established; and this is the aim of this study. Methods This cross-sectional observational study was conducted on the first 50 consecutive patients diagnosed with CSF by elective coronary angiography (CAG). They were compared with another 50 consecutive patients showing normal coronaries by CAG. Beck Anxiety Inventory and Beck Depression Inventory were used for assessment. CSF was diagnosed by coronary angiography “Thrombolysis In Myocardial Infarction” frame count. Lipid profile was obtained for all patients. Results Traditional risk factors (male gender, smoking, total cholesterol, low-density lipoproteins and triglycerides) were higher in the CSF group. Depression and anxiety scores were also higher in the CSF group. On multivariate analysis, male gender, depression and high triglycerides were the only significant independent predictors of CSF. A significant correlation existed between CSF and both anxiety and depression scores. Both scores were also significantly higher in multivessel vs single vessel affection. Conclusion Psychiatric depression, male gender and high triglycerides are highly associated with CSF in patients undergoing elective CAG. There is a significant correlation between CSF severity and the severity of both anxiety and depression. Further studies are warranted to explore the impact of psychological intervention on CSF and its long-term outcome.
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Kayapinar O, Ozde C, Kaya A. Relationship Between the Reciprocal Change in Inflammation-Related Biomarkers (Fibrinogen-to-Albumin and hsCRP-to-Albumin Ratios) and the Presence and Severity of Coronary Slow Flow. Clin Appl Thromb Hemost 2019; 25:1076029619835383. [PMID: 30857397 PMCID: PMC6714912 DOI: 10.1177/1076029619835383] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Inflammation has been implicated in the pathogenesis of endothelial dysfunction, atherosclerosis, and microvascular coronary dysfunction. In this context, it is thought that fibrinogen, high-sensitive C-reactive protein (hsCRP), and albumin may be associated with the pathogenesis of coronary slow flow (CSF). We aimed to evaluate the ratios of fibrinogen-to-albumin and hsCRP-to-albumin in patients with CSF compared to patients with angiographically normal coronary arteries and stable coronary artery disease (CAD). In all, 65 patients with CSF, 65 patients with newly diagnosed stable CAD, and 65 control participants with angiographically normal coronary arteries were included. The coronary flow rates of all patients were determined by the Thrombolysis in Myocardial Infarction frame count method. Fibrinogen, hsCRP, and albumin levels were analyzed in all patients, and the fibrinogen-to-albumin and hsCRP-to-albumin ratios were calculated. The baseline characteristics of the 3 groups were similar. The plasma albumin level was significantly lower, whereas the fibrinogen and the hsCRP levels were significantly higher, in the CSF and CAD groups compared to the controls. The fibrinogen-to-albumin and hsCRP-to-albumin ratios were significantly higher in both the CSF and the CAD groups compared to the control group. The hsCRP-to-albumin ratio was positively correlated with the mean Thrombolysis in Myocardial Infarction frame count in the whole study population. According to the receiver–operating characteristic analysis, the efficacies of the fibrinogen-to-albumin and hsCRP-to-albumin ratios in predicting CSF were significant. The fibrinogen-to-albumin and hsCRP-to-albumin ratios, which were increased by a reciprocal change, suggest that inflammation may play a role in the pathogenesis of CSF.
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Affiliation(s)
- Osman Kayapinar
- 1 Cardiology, Duzce University School of Medicine, Duzce, Turkey
| | - Cem Ozde
- 1 Cardiology, Duzce University School of Medicine, Duzce, Turkey
| | - Adnan Kaya
- 1 Cardiology, Duzce University School of Medicine, Duzce, Turkey
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Clinical Profile and Outcome in Patients with Coronary Slow Flow Phenomenon. Cardiol Res Pract 2019; 2019:9168153. [PMID: 31205785 PMCID: PMC6530115 DOI: 10.1155/2019/9168153] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 03/10/2019] [Accepted: 04/23/2019] [Indexed: 01/20/2023] Open
Abstract
The coronary slow flow phenomenon (CSFP) is a poorly recognized clinical entity characterized by delayed distal vessel opacification in the absence of epicardial coronary stenosis and presently lack of specific data on the clinical profile and outcome. We investigated a cohort of 429 patients who fulfilled the criteria for CSFP to explore the clinical feature, outcome, and risk factor of prognosis. Two teams (clinical center and core lab) were blind to patient data for the assessment of coronary angiograph using corrected thrombolysis in myocardial infarction (TIMI) frame count (CTFC). The study cohort consisted of 429 patients (294 men, 68.5%), aged from 30 to 78 years (mean, 54 years). Two hundred patients (46.6%) out of 429 patients had a history of hypertension, 72 (16.8%) had diabetes mellitus, and 222 (51.7%) had dyslipidemia. All the rates of agreement between two teams in evaluating whether normal flow (CTFC ≤ 27 frames) or slow flow (CTFC > 27 frames) were moderate (0.40 < κ < 0.75) for the three arteries. Follow-up (mean, 3.8 years) was done for 421 patients (98.1%). The major adverse cardiovascular events (MACE) occurred in 39 patients (9.3%) out of 421 patients. Multivariate analysis showed that the risk of MACE approximately doubles with age >50 years (hazard ratio (HR) = 2.2, 95% CI: 1.0 to 4.9, and P=0.042), hypertension (HR = 2.1, 95% CI: 1.1 to 4.2, and P=0.021), and dyslipidemia (HR = 2.0, 95% CI: 1.0 to 3.9, and P=0.042). CSFP affects predominantly patients at middle age and above but can occur in any age group; CSFP should be more concerned, particularly in patients >50 years old with hypertension and dyslipidemia.
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Alvarez C, Siu H. Coronary Slow-Flow Phenomenon as an Underrecognized and Treatable Source of Chest Pain: Case Series and Literature Review. J Investig Med High Impact Case Rep 2018; 6:2324709618789194. [PMID: 30038914 PMCID: PMC6050810 DOI: 10.1177/2324709618789194] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 06/10/2018] [Accepted: 06/23/2018] [Indexed: 01/08/2023] Open
Abstract
Background. Coronary slow-flow phenomenon (CSFP) is characterized by delayed distal vessel opacification of contrast, in the absence of significant epicardial coronary stenosis. CSFP has been reported as a cause of chest pain and abnormal noninvasive ischemic tests and is often underrecognized. Material and Methods. Charts and angiographic records from our institution were reviewed to identify 15 consecutive patients who were diagnosed with CSFP from January 2016 to January 2017. Results. Of the 15 patients (4 females and 11 males) studied, the mean age was 59.1 years (range = 45-86 years); all had left ventricular ejection fraction >45% and without significant valvular stenosis/regurgitation. The indication for coronary angiography for all 15 patients was chest pain with abnormal noninvasive tests. Of the 11 patients who underwent previous coronary angiograms, all revealed prior evidence of CSFP. None of these patients were on calcium channel blockers (CCBs) or long-acting nitroglycerin agents before angiography. Intracoronary CCBs were effectively utilized to alleviate the angiographic finding (improvement in Thrombolysis in Myocardial Infarction frame count) in all 15 patients. Oral CCBs were started with subsequent improvement in all 15 patients (mean follow-up time = 13.6 months). Conclusion. Coronary slow-flow should be a diagnostic consideration in patients presenting with chest pain and abnormal noninvasive ischemic testing with nonobstructive epicardial vessels. CSFP remains underrecognized, and the specific standard of care for treatment has not been established. In each of the 15 cases, intracoronary nifedipine resolved the angiographic manifestation of coronary slow-flow. Furthermore, in follow-up, all patients improved symptomatically from their chest pain after oral CCBs were initiated.
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Affiliation(s)
| | - Henry Siu
- St. Francis Medical Center, Trenton, NJ, USA.,Thomas Jefferson University, Philadelphia, PA, USA
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Caimi G, Hopps E, Montana M, Andolina G, Urso C, Canino B, Lo Presti R. Analysis of the Blood Viscosity Behavior in the Sicilian Study on Juvenile Myocardial Infarction. Clin Appl Thromb Hemost 2018; 24:1276-1281. [PMID: 29792062 PMCID: PMC6714779 DOI: 10.1177/1076029618775511] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Considering the role of hemorheology in coronary circulation, we studied blood viscosity in patients with juvenile myocardial infarction. We examined whole blood viscosity at high shear rate using the cone-on-plate viscosimeter Wells-Brookfield ½ LVT and at low shear rate employing a viscometer Contraves LS30 in 120 patients (aged <46 years) with myocardial infarction, at the initial stage and subsequently 3 and 12 months after. At the initial stage, patients had an increased whole blood viscosity in comparison to normal controls. This hemorheological profile was not influenced by the cardiovascular risk factors, nor by the extent of coronary lesions, even if some differences were evident between patients with ST-segment elevation myocardial infarction (STEMI) and non-STEMI (NSTEMI). The blood viscosity pattern at the initial stage did not influence recurring ischemic events or the onset of heart failure during an 18 months’ follow-up. The neutrophil to lymphocyte ratio did not affect the blood viscosity pattern. We reevaluated 83 patients 3 months after and 70 patients 12 months after the acute coronary syndrome, and we found that the hemorheological parameters were still altered in comparison to normal controls at both times. We observed an impairment of the hemorheological pattern in young patients with myocardial infarction, partially influenced by the infarction type (STEMI and NSTEMI) and persisting in the long term.
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Affiliation(s)
- Gregorio Caimi
- 1 Dipartimento Biomedico di Medicina Interna e Specialistica, Università degli Studi di Palermo, Palermo, Italy
| | - Eugenia Hopps
- 1 Dipartimento Biomedico di Medicina Interna e Specialistica, Università degli Studi di Palermo, Palermo, Italy
| | - Maria Montana
- 1 Dipartimento Biomedico di Medicina Interna e Specialistica, Università degli Studi di Palermo, Palermo, Italy
| | - Giuseppe Andolina
- 1 Dipartimento Biomedico di Medicina Interna e Specialistica, Università degli Studi di Palermo, Palermo, Italy
| | - Caterina Urso
- 1 Dipartimento Biomedico di Medicina Interna e Specialistica, Università degli Studi di Palermo, Palermo, Italy
| | - Baldassare Canino
- 1 Dipartimento Biomedico di Medicina Interna e Specialistica, Università degli Studi di Palermo, Palermo, Italy
| | - Rosalia Lo Presti
- 1 Dipartimento Biomedico di Medicina Interna e Specialistica, Università degli Studi di Palermo, Palermo, Italy
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Okuya Y, Saito Y, Kitahara H, Nakayama T, Fujimoto Y, Kobayashi Y. Intraluminal Intensity of Blood Speckle on Intravascular Ultrasound, a Novel Predictor of Periprocedural Myocardial Injury After Coronary Stenting. Am J Cardiol 2017; 120:1084-1089. [PMID: 28781024 DOI: 10.1016/j.amjcard.2017.06.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 06/13/2017] [Accepted: 06/29/2017] [Indexed: 11/16/2022]
Abstract
The difference in the intraluminal intensity of blood speckle (IBS) on integrated backscatter-intravascular ultrasound (IB-IVUS) across a coronary artery stenosis (i.e., ΔIBS) has previously shown a negative correlation with fractional flow reserve, reflecting an impaired coronary blood flow. Periprocedural myocardial injury (PMI) after coronary stenting has also been associated with coronary circulatory dysfunction. The aim of this study was to investigate the relation between ΔIBS after coronary stenting and PMI. A total of 180 patients who underwent elective coronary stenting under IVUS guidance for a single lesion were included. Intraluminal IBS was measured using IB-IVUS in cross sections at the ostium of the target vessel and at the distal reference of the stent. ΔIBS was calculated as (distal IBS value) - (ostium IBS value). PMI was defined as an elevation of troponin I >5 times the 99th percentile upper reference limit (>0.45 ng/ml) within 24 hours after the procedure. The mean ΔIBS after coronary stenting was 6.52 ± 5.71. There was a significantly greater use of the rotational atherectomy, the number of stents, the total stent length, and ΔIBS in patients with PMI than those without. In the receiver operating characteristic curve analysis, ΔIBS significantly predicted PMI (area under the curve 0.64, best cut-off value 7.88, p = 0.001). Multiple logistic regression analysis determined that the total stent length, the use of rotational atherectomy, and ΔIBS were independent predictors of PMI. In conclusion, greater ΔIBS assessed by IB-IVUS was significantly associated with PMI after coronary stenting in patients with a stable coronary artery disease.
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Affiliation(s)
- Yoshiyuki Okuya
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.
| | - Yuichi Saito
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Hideki Kitahara
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Takashi Nakayama
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yoshihide Fujimoto
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Yoshio Kobayashi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
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Caimi G, Lo Presti R, Andolina G, Hopps E. Short-Term Prognosis of Juvenile Myocardial Infarction. Angiology 2016; 67:799-801. [PMID: 26764365 DOI: 10.1177/0003319715626065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Gregorio Caimi
- Dipartimento Biomedico di Medicina Interna e Specialistica, Università di Palermo, Palermo, Italy
| | - R Lo Presti
- Dipartimento Biomedico di Medicina Interna e Specialistica, Università di Palermo, Palermo, Italy
| | - G Andolina
- Dipartimento Biomedico di Medicina Interna e Specialistica, Università di Palermo, Palermo, Italy
| | - E Hopps
- Dipartimento Biomedico di Medicina Interna e Specialistica, Università di Palermo, Palermo, Italy
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Çetin M, Kiziltunc E, Elalmış ÖU, Çetin ZG, Demirçelik MB, Çiçekçioğlu H, Kurtul A, Özkan S, Avan CM, Örnek E, Ulusoy FV. Predictive Value of Neutrophil Lymphocyte Ratio and Platelet Lymphocyte Ratio in Patients with Coronary Slow Flow. ACTA CARDIOLOGICA SINICA 2016; 32:307-12. [PMID: 27274171 DOI: 10.6515/acs20150119i] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Increased microvascular resistance due to chronic inflammation is assumed to be one of the mechanisms associated with coronary slow flow (CSF). Previous studies have shown that the platelet-to-lymphocyte ratio (PLR) and the neutrophil-lymphocyte ratio (NLR) are markers of inflammation for various diseases. In this study we aimed to evaluate the relationship between CSF and PLR-NLR. METHODS Seventy-eight patients with CSF and 50 patients with normal coronary flow were enrolled into this study. The study subjects underwent medical examination and testing, after which their platelet-to-lymphocyte ratios and NLR values were calculated. An independent observer measured the coronary flow rate by Thrombolysis in Myocardial Infarction Frame Count (TFC) method. The platelet-to-lymphocyte ratio and NLR values were compared between the groups and correlation analysis was performed to explore the relationship between mean TFC with PLR and NLR. RESULTS Platelet-to-lymphocyte ratio and NLR values were significantly higher in patients with CSF (p < 0.001). There was a positive significant correlation between TFC with NLR and PLR (Spearman's Rho: 0.59, p < 0.001 and Spearman's Rho: 0.30, p = 0.001, respectively). Multivariate logistic regression analysis revealed that NLR is the one independent predictor for CSF. CONCLUSIONS This study demonstrated an association between CSF and PLR-NLR. Although the exact mechanism could not be explained, our findings support the possible role of inflammation in CSF physiopathology.
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Affiliation(s)
- Mustafa Çetin
- Department of Cardiology, Ankara Numune Education and Research Hospital
| | | | | | - Zehra Güven Çetin
- Department of Cardiology, Ankara Numune Education and Research Hospital
| | | | - Hülya Çiçekçioğlu
- Department of Cardiology, Ankara Numune Education and Research Hospital
| | - Alparslan Kurtul
- Department of Cardiology, Ankara Education and Research Hospital
| | - Selçuk Özkan
- Department of Cardiology, Ankara Keçiören Education and Research Hospital
| | | | - Ender Örnek
- Department of Cardiology, Ankara Numune Education and Research Hospital
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Sanati H, Kiani R, Shakerian F, Firouzi A, Zahedmehr A, Peighambari M, Shokrian L, Ashrafi P. Coronary Slow Flow Phenomenon Clinical Findings and Predictors. Res Cardiovasc Med 2016; 5:e30296. [PMID: 26889458 PMCID: PMC4752610 DOI: 10.5812/cardiovascmed.30296] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 06/28/2015] [Accepted: 07/06/2015] [Indexed: 11/29/2022] Open
Abstract
Background: In some patients with chest pain, selective coronary angiography reveals slow contrast agent passage through the epicardial coronary arteries in the absence of stenosis. This phenomenon has been designated the slow coronary flow (SCF) phenomenon. Objectives: In this study, we aimed to describe the demographic and clinical findings and presence of common atherosclerosis risk factors in patients with the SCF phenomenon. Patients and Methods: Between October 2014 and March 2015, demographic data, clinical histories, atherosclerosis risk factors, and laboratory and angiographic findings were recorded for all consecutive patients scheduled for coronary angiography and diagnosed with the SCF phenomenon, as well as a control group (patients with normal epicardial coronary arteries; NECA). SCF was diagnosed based on the thrombolysis in myocardial infarction frame count (TFC). A TFC > 27 indicated a diagnosis of SCF phenomenon. Results: Among the 3600 patients scheduled for selective coronary angiography, 75 (2%) met the SCF criteria. SCF and NECA patients did not exhibit statistically significant differences in traditional risk factors except for hypertension, which was more prevalent in SCF than NECA patients (52% versus 31%, P = 0.008). A multivariable analysis indicated a low body mass index, presence of hypertension, low high-density lipoprotein cholesterol (HDL-c) level, and high hemoglobin level as independent predictors of the SCF phenomenon; of these, hypertension was the strongest predictor (odds ratio = 6.3, 95% confidence interval: 2.2 - 17.9, P = 0.001). Conclusions: The SCF phenomenon is relatively frequent, particularly among patients with acute coronary syndrome who are scheduled for coronary angiography. Hypertension, a low HDL-c level, and high hemoglobin level can be considered independent predictors of this phenomenon.
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Affiliation(s)
- Hamidreza Sanati
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran
| | - Reza Kiani
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran
| | - Farshad Shakerian
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran
| | - Ata Firouzi
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran
| | - Ali Zahedmehr
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran
- Corresponding author: Ali Zahedmehr, Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Vali-Asr ST., Niayesh Blvd, Tehran, IR Iran. Tel: +98-2123922108, Fax: +98-2122042026, E-mail:
| | - Mohammadmehdi Peighambari
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran
| | - Leila Shokrian
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran
| | - Peiman Ashrafi
- Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran
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Chen Z, Chen X, Li S, Huo X, Fu X, Dong X. Nicorandil improves myocardial function by regulating plasma nitric oxide and endothelin-1 in coronary slow flow. Coron Artery Dis 2015; 26:114-20. [PMID: 25325437 PMCID: PMC4323571 DOI: 10.1097/mca.0000000000000179] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Coronary slow flow (CSF) is a special coronary microvascular disorder. The pathogenesis and effective therapeutics of CSF remain unclear. This study aimed to evaluate the global and regional functions of the left ventricle (LV) and investigate the efficacy of nicorandil in patients with CSF. PATIENTS AND METHODS Thirty-six patients with CSF in the left anterior descending (LAD) branch and 20 patients with normal coronary arteries were included. Global and regional functions of the LV supplied by LAD were measured using conventional Doppler echocardiography and two-dimensional speckle tracking echocardiography, respectively, within 24 h after coronary angiography. Concentrations of plasma nitric oxide (NO) and endothelin-1 (ET-1) were detected using colorimetry and radioimmunoassay, respectively. The function of the LV and the levels of NO and ET-1 were also investigated before and 90 days after treatment with 15 mg/day of nicorandil. RESULTS Compared with the control group, the early diastolic peak velocity (E), E/A ratio, and plasma NO levels were lower, whereas the late diastolic peak flow velocity (A) and plasma ET-1 levels were significantly higher in the CSF group (P<0.05). The longitudinal strain rate peak of the LV was reduced significantly in CSF patients (P<0.001). After treatment, 75% (27/36) of CSF patients were free of chest pain. The values of E peak, E/A ratio, longitudinal strain rate peak, and plasma NO level were increased (P<0.001), whereas the ET-1 level was decreased in CSF patients (P<0.001). CONCLUSION Nicorandil may improve chest pain symptoms and the impaired function of the LV, possibly by increasing plasma NO and reducing ET-1 in CSF.
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Affiliation(s)
- Zuoyuan Chen
- Departments of aCardiology bCardiac Ultrasound, The Affiliated Hospital of Qingdao University cDepartment of Internal Medicine, Qingdao Commercial Hospital dDepartment of Cardiology, Qingdao Fifth People's Hospital, Qingdao eDepartment of Cardiology, Dezhou People's Hospital, Dezhou, Shandong, China
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Yamanaga K, Tsujita K, Komura N, Kaikita K, Sakamoto K, Miyazaki T, Saito M, Ishii M, Tabata N, Akasaka T, Arima Y, Yamamoto E, Yamamuro M, Izumiya Y, Kojima S, Tayama S, Nakamura S, Hokimoto S, Ogawa H. Physiological basis of discordance between coronary flow velocity reserve and hyperemic microvascular resistance for evaluating coronary microvascular dysfunction in patients without atherosclerotic obstruction. Int J Cardiol 2015; 201:535-7. [PMID: 26322602 DOI: 10.1016/j.ijcard.2015.08.102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/07/2015] [Accepted: 08/09/2015] [Indexed: 11/30/2022]
Affiliation(s)
- Kenshi Yamanaga
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Kenichi Tsujita
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.
| | - Naohiro Komura
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Koichi Kaikita
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Kenji Sakamoto
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Takashi Miyazaki
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Michiyo Saito
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Masanobu Ishii
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Noriaki Tabata
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Tomonori Akasaka
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Yuichiro Arima
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Eiichiro Yamamoto
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Megumi Yamamuro
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Yasuhiro Izumiya
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Sunao Kojima
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Shinji Tayama
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Sunao Nakamura
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan; Divison of Cardiology, New Tokyo Hospital, Matsudo, Japan
| | - Seiji Hokimoto
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Hisao Ogawa
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
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Thermodilutional Confirmation of Coronary Microvascular Dysfunction in Patients With Recurrent Angina After Successful Percutaneous Coronary Intervention. Can J Cardiol 2015; 31:989-97. [DOI: 10.1016/j.cjca.2015.03.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 03/01/2015] [Accepted: 03/02/2015] [Indexed: 12/27/2022] Open
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Sadr-Ameli MA, Saedi S, Saedi T, Madani M, Esmaeili M, Ghardoost B. Coronary slow flow: Benign or ominous? Anatol J Cardiol 2014; 15:531-5. [PMID: 25537993 PMCID: PMC5337030 DOI: 10.5152/akd.2014.5578] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objective: Coronary slow flow phenomenon has been arbitrarily defined as delayed coronary blood flow in the absence of obstructive coronary artery disease. The present study sought to investigate the clinical features, natural history, and outcomes of affected patients. Methods: In this prospective cross-sectional study, 217 consecutive patients who had undergone coronary angiography and showed features of coronary slow flow phenomenon were evaluated for demographic and coronary risk factor profile, as well as clinical outcomes, at baseline and following treatment. Results: The study population consisted of 165 (76%) males and 52 (24%) females. The mean age of patients was 52.6±10 years. Mean ejection fraction was 48.2±5.4, 39.3% had diabetes, 43.3% had hypertension, 49.8% was a cigarette smoker, 41.9% had dyslipidemia, and 15% had a familial history of cardiac disease. Forty-nine percent was detected to have abnormal hsCRP levels. The most prevalent presenting complaint was atypical chest pain. Fifty-four percent of patients had slow blood flow in all three vessels. Thirty-six people had undergone repeat coronary angiography in a follow-up period of 5-7 years due to persisting or worsening clinical symptoms, of whom 6 (16.6%) showed significant coronary artery stenosis. Eight (22.2%) had mild CAD, and the rest still showed coronary slow flow without significant stenosis. The most common complaint during follow-up and after initiation of medical therapy was nonanginal chest pain. Conclusion: Patients with coronary slow flow phenomenon are predisposed to atherosclerosis and obstructive coronary artery disease. Therefore, this pathology should not be considered as a totally benign condition. Primary and secondary cardiovasculature preventive measures should be constituted and seem worthwhile in this patient population.
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Affiliation(s)
- Mohammad Ali Sadr-Ameli
- Department of Cardiology, Shahid Rajaie Cardiovascular, Medical, Research Center, Iran University of Medical Sciences; Tehran-Iran.
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Di Fiore DP, Beltrame JF. Chest pain in patients with 'normal angiography': could it be cardiac? INT J EVID-BASED HEA 2013; 11:56-68. [PMID: 23448331 DOI: 10.1111/1744-1609.12002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Approximately 20% of patients undergoing diagnostic angiography for the evaluation of chest pain are found to have a normal coronary angiogram. Although this finding is generally associated with a low risk of cardiac events, approximately half will continue to experience chest pain over the next 12 months. Therefore, the finding of normal angiography warrants further evaluation of the potential causes for the presenting chest pain if we are to improve the disability suffered by these patients. In this review, the potential non-cardiac and cardiac causes for the chest pain in patients with normal angiography are briefly discussed with an in-depth focus on coronary vasomotor disorders including coronary artery spasm (variant angina) and microvascular disorders such as syndrome X, microvascular angina, the coronary slow flow phenomenon and microvascular spasm.
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Affiliation(s)
- David P Di Fiore
- The Queen Elizabeth Hospital, Discipline of Medicine, The University of Adelaide, Woodville South, South Australia, Australia
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Herrmann J, Kaski JC, Lerman A. Coronary microvascular dysfunction in the clinical setting: from mystery to reality. Eur Heart J 2012; 33:2771-2782b. [PMID: 22915165 DOI: 10.1093/eurheartj/ehs246] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Far more extensive than the epicardial coronary vasculature that can be visualized angiographically is the coronary microcirculation, which foregoes routine imaging. Probably due to the lack of techniques able to provide tangible evidence of its crucial role, the clinical importance of coronary microvascular dysfunction is not fully appreciated. However, evidence gathered over the last several decades indicates that both functional and structural abnormalities of the coronary microvasculature can lead to myocardial ischaemia, often comparable with that caused by obstructive coronary artery disease. Indeed, a marked increase in coronary microvascular resistance can impair coronary blood flow and trigger angina pectoris, ischaemic ECG shifts, and myocardial perfusion defects, and lead to left ventricular dysfunction in patients who otherwise have patent epicardial coronary arteries. This condition--often referred to as 'chest pain with normal coronary arteries' or 'cardiac syndrome X'--encompasses several pathogenic mechanisms involving the coronary microcirculation. Of importance, coronary microvascular dysfunction can occur in conjunction with several other cardiac disease processes. In this article, we review the pathogenic mechanisms leading to coronary microvascular dysfunction and its diagnostic assessment, as well as the different clinical presentations and prognostic implications of microvascular angina. As such, this review aims to remove at least some of the mystery surrounding the notion of coronary microvascular dysfunction and to show why it represents a true clinical entity.
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Affiliation(s)
- Joerg Herrmann
- Division of Cardiovascular Disease, Department of Internal Medicine, Mayo Clinic, Rochester, NY, USA
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47
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Goette A, Bukowska A, Lillig CH, Lendeckel U. Oxidative Stress and Microcirculatory Flow Abnormalities in the Ventricles during Atrial Fibrillation. Front Physiol 2012; 3:236. [PMID: 22783202 PMCID: PMC3389777 DOI: 10.3389/fphys.2012.00236] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Accepted: 06/11/2012] [Indexed: 11/13/2022] Open
Abstract
Patients with atrial fibrillation (AF) often present with typical angina pectoris and mildly elevated levels of cardiac troponin (non-ST-segment elevation myocardial infarction) during an acute episode of AF. However, in a large proportion of these patients, significant coronary artery disease is excluded by coronary angiography, which suggests that AF itself influences myocardial blood flow. The present review summarizes the effect of AF on the occurrence of ventricular oxidative stress, redox-sensitive signaling pathways and gene expression, and microcirculatory flow abnormalities in the left ventricle.
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Affiliation(s)
- Andreas Goette
- Department of Cardiology and Intensive Care Medicine, St. Vincenz-Hospital Paderborn Paderborn, Germany
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48
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Li L, Gu Y, Liu T, Bai Y, Hou L, Cheng Z, Hu L, Gao B. A randomized, single-center double-blinded trial on the effects of diltiazem sustained-release capsules in patients with coronary slow flow phenomenon at 6-month follow-up. PLoS One 2012; 7:e38851. [PMID: 22761709 PMCID: PMC3384631 DOI: 10.1371/journal.pone.0038851] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Accepted: 05/10/2012] [Indexed: 11/29/2022] Open
Abstract
Objective The aim of this study is to observe the chronic effects of diltiazem release capsules on patients with coronary slow flow (CSF) phenomenon. Methods From 2004 to 2009, 80 consecutive patients with chest pain and normal coronary arteries evidenced by coronary angiography and CSF were included in this randomized, double-blind, placebo-controlled trial. CSF patterns were evaluated by the corrected TIMI frame count. Patients were randomly assigned at 1∶1 ratio to diltiazem sustained-release capsules treatment group (Dil, 90 mg twice daily) or placebo control group. Holter, liver and kidney function, treadmill exercise test, coronary angiography and left ventricular angiography were measured at baseline and after 6 months. The incidence of cardiovascular events (re-admission or progress in coronary heart disease, myocardial infarction, malignant arrhythmia or cardiac death) was evaluated during the 6 months follow up. Results Thirty-nine patients in control and 40 patients in Dil group completed the 6 months follow-up. There was no medication induced drug withdraw during follow up. Left ventricular ejection fraction was similar between the 2 groups at baseline and during follow up. Heart rate was significantly lower in Dil group than in control group and there was no symptomatic bradycardia and II and III degree atrioventricular conduction block in both groups. Significant improvement was observed in the onset of chest pain, treadmill exercise test and coronary blood flow in Dil group while these parameters remained unchanged in control group at the end of 6 months follow up. The incidence of cardiovascular events was similar between the two groups. Conclusion Diltiazem slow-release capsules improved coronary blood flow and alleviated angina in patients with CSF. Trial Registration Chinese Clinical Trial Registry ChiCTR-TCC-11001864
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Affiliation(s)
- Lun Li
- Department of Cardiology, Wuhan Puai Hospital, Huazhong University Of Science and Technology, Wuhan, China
| | - Ye Gu
- Department of Cardiology, Wuhan Puai Hospital, Huazhong University Of Science and Technology, Wuhan, China
- * E-mail:
| | - Tao Liu
- Department of Cardiology, Wuhan Puai Hospital, Huazhong University Of Science and Technology, Wuhan, China
| | - Yupeng Bai
- Department of Cardiology, Wuhan Puai Hospital, Huazhong University Of Science and Technology, Wuhan, China
| | - Lingbo Hou
- Department of Cardiology, Wuhan Puai Hospital, Huazhong University Of Science and Technology, Wuhan, China
| | - Zhong Cheng
- Department of Cardiology, Wuhan Puai Hospital, Huazhong University Of Science and Technology, Wuhan, China
| | - Liqun Hu
- Department of Cardiology, Wuhan Puai Hospital, Huazhong University Of Science and Technology, Wuhan, China
| | - Bo Gao
- Department of Cardiology, Wuhan Puai Hospital, Huazhong University Of Science and Technology, Wuhan, China
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Yoon HJ, Jeong MH, Cho SH, Kim KH, Lee MG, Park KH, Sim DS, Yoon NS, Hong YJ, Kim JH, Ahn Y, Cho JG, Park JC, Kang JC. Endothelial dysfunction and increased carotid intima-media thickness in the patients with slow coronary flow. J Korean Med Sci 2012; 27:614-8. [PMID: 22690091 PMCID: PMC3369446 DOI: 10.3346/jkms.2012.27.6.614] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Accepted: 03/13/2012] [Indexed: 01/22/2023] Open
Abstract
Flow mediated brachial dilatation (FMD) and carotid intima-media thickness (IMT) have been a surrogate for early atherosclerosis. Slow coronary flow in a normal coronary angiogram is not a rare condition, but its pathogenesis remains unclear. A total of 85 patients with angina were evaluated of their brachial artery FMD, carotid IMT and conventional coronary angiography. Coronary flow was quantified using the corrected thrombosis in myocardial infarction (TIMI) frame count method. Group I was a control with normal coronary angiography (n = 41, 56.1 ± 8.0 yr) and group II was no significant coronary stenosis with slow flow (n = 44, 56.3 ± 10.0 yr). Diabetes was rare but dyslipidemia and family history were frequent in group II. Heart rate was higher in group II than in group I. White blood cells, especially monocytes and homocysteine were higher in group II. The FMD was significantly lower in group II than in group I. Elevated heart rate, dyslipidemia and low FMD were independently related with slow coronary flow in regression analysis. Therefore, endothelial dysfunction may be an earlier vascular phenomenon than increased carotid IMT in the patients with slow coronary flow.
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Affiliation(s)
- Hyun Ju Yoon
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Myung Ho Jeong
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Sook Hee Cho
- Department of Nursing, Nambu University, Gwangju, Korea
| | - Kye Hun Kim
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Min Goo Lee
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Keun Ho Park
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Doo Sun Sim
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Nam Sik Yoon
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Young Joon Hong
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Ju Han Kim
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Youngkeun Ahn
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Jeong Gwan Cho
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Jong Chun Park
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
| | - Jung Chaee Kang
- The Heart Center of Chonnam National University Hospital, Gwangju, Korea
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Ozeke O, Gungor M, Ertan C, Celik A, Aydin D, Erturk O, Hizel SB, Ozgen F, Demir AD, Ozer C. Association of sleep apnea with coronary slow-flow phenomenon. J Cardiovasc Med (Hagerstown) 2012; 13:376-80. [DOI: 10.2459/jcm.0b013e3283528f14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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