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O’Regan DP, Shi W, Ariff B, Baksi AJ, Durighel G, Rueckert D, Cook SA. Remodeling after acute myocardial infarction: mapping ventricular dilatation using three dimensional CMR image registration. J Cardiovasc Magn Reson 2012; 14:41. [PMID: 22720881 PMCID: PMC3411469 DOI: 10.1186/1532-429x-14-41] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 06/21/2012] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Progressive heart failure due to remodeling is a major cause of morbidity and mortality following myocardial infarction. Conventional clinical imaging measures global volume changes, and currently there is no means of assessing regional myocardial dilatation in relation to ischemic burden. Here we use 3D co-registration of Cardiovascular Magnetic Resonance (CMR) images to assess the long-term effects of ischemia-reperfusion injury on left ventricular structure after acute ST-elevation myocardial infarction (STEMI). METHODS Forty six patients (age range 33-77 years) underwent CMR imaging within 7 days following primary percutaneous coronary intervention (PPCI) for acute STEMI with follow-up at one year. Functional cine imaging and Late Gadolinium Enhancement (LGE) were segmented and co-registered. Local left ventricular wall dilatation was assessed by using intensity-based similarities to track the structural changes in the heart between baseline and follow-up. Results are expressed as means, standard errors and 95% confidence interval (CI) of the difference. RESULTS Local left ventricular remodeling within infarcted myocardium was greater than in non-infarcted myocardium (1.6%±1.0 vs 0.3%±0.9, 95% CI: -2.4% - -0.2%, P=0.02). One-way ANOVA revealed that transmural infarct thickness had a significant effect on the degree of local remodeling at one year (P<0.0001) with greatest wall dilatation observed when infarct transmurality exceeded 50%. Infarct remodeling was more severe when microvascular obstruction (MVO) was present (3.8%±1.3 vs -1.6%±1.4, 95% CI: -9.1% - -1.5%, P=0.007) and when end-diastolic volume had increased by >20% (4.8%±1.4 vs -0.15%±1.2, 95% CI: -8.9% - -0.9%, P=0.017). CONCLUSIONS The severity of ischemic injury has a significant effect on local ventricular wall remodeling with only modest dilatation observed within non-ischemic myocardium. Limitation of chronic remodeling may therefore depend on therapies directed at modulating ischemia-reperfusion injury. CMR co-registration has potential for assessing dynamic changes in ventricular structure in relation to therapeutic interventions.
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Affiliation(s)
- Declan P O’Regan
- Robert Steiner MRI Unit, MRC Clinical Sciences Centre, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 0NN, UK
| | - Wenzhe Shi
- Department of Computing, Imperial College London, South Kensington Campus, Exhibition Road, London, SW7 2AZ, UK
| | - Ben Ariff
- Department of Imaging, Imperial College Healthcare NHS Trust, Hammersmith Hospital, Du Cane Road, London, W12 0HS, UK
| | - A John Baksi
- Department of Cardiology, Imperial College Healthcare NHS Trust, London, Hammersmith Hospital, Du Cane Road, London, W12 0HS, UK
| | - Giuliana Durighel
- Robert Steiner MRI Unit, MRC Clinical Sciences Centre, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 0NN, UK
| | - Daniel Rueckert
- Department of Computing, Imperial College London, South Kensington Campus, Exhibition Road, London, SW7 2AZ, UK
| | - Stuart A Cook
- Robert Steiner MRI Unit, MRC Clinical Sciences Centre, Imperial College London, Hammersmith Hospital Campus, Du Cane Road, London, W12 0NN, UK
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Ilkay E, Kacmaz F, Maden O, Aksu T, Selcuk MT, Erbay AR, Demir AD. A new electrocardiographic marker of myocardial reperfusion in patients with acute ST-segment elevation myocardial infarction treated with primary percutaneous intervention: the value of QRS duration. EUROINTERVENTION 2012; 7:1406-12. [PMID: 22522551 DOI: 10.4244/eijv7i12a220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIMS Although ischaemia-induced QRS complex changes have been described previously, their relation with reperfusion status is not clear. We aimed to investigate the relation of QRS duration with reperfusion at tissue level compared to myocardial blush in patients with acute myocardial infarction who underwent successful primary percutaneous coronary angioplasty. METHODS AND RESULTS One hundred and forty-eight patients were enrolled. Based on the post-angioplasty myocardial blush grade (MBG), patients were divided into reperfusion (grades 2 and 3) and impaired reperfusion (grades 0 and 1) groups. Although the two groups did not differ in terms of admission QRS duration (81±17 vs. 79±15 msec, p=0.473), the patients in the impaired reperfusion group had a significantly longer QRS duration both at immediate post-angioplasty (78±18 vs. 68±17 msec, p=0.001) and at the 60th minute ECG (77±17 vs. 60±17 msec, p<0.001). Patients in the impaired reperfusion group revealed significantly less narrowing of QRS duration in the post-angioplasty 60th minute ECG (6±5 vs. 20±5 msec, p<0.001) when compared to the patients in the reperfusion group. After adjusting all variables, QRS narrowing in the 60th minute ECG was determined as an independent electrocardiographic predictor of reperfusion (OR:1.39, 95% CI: 1.25-1.54, p<0.001). CONCLUSIONS We demonstrated that QRS duration is a strong indicator of myocardial reperfusion status.
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Affiliation(s)
- Erdogan Ilkay
- Department of Cardiology, TOBB ETÜ Hospital, Ankara, Turkey
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Ahmed TA, Sorgdrager BJ, Cannegieter SC, van der Laarse A, Schalij MJ, Jukema W. Pre-infarction angina predicts thrombus burden in patients admitted for ST-segment elevation myocardial infarction. EUROINTERVENTION 2012; 7:1396-1405. [DOI: 10.4244/eijv7i12a219] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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Implications of ST-segment elevation in leads V5 and V6 in patients with reperfused inferior wall acute myocardial infarction. Am J Cardiol 2012; 109:314-9. [PMID: 22078965 DOI: 10.1016/j.amjcard.2011.09.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2011] [Revised: 09/13/2011] [Accepted: 09/13/2011] [Indexed: 11/22/2022]
Abstract
During inferior acute myocardial infarction, ST-segment elevation (ST↑) often occurs in leads V(5) to V(6), but its clinical implications remain unclear. We examined the admission electrocardiograms from 357 patients with a first inferior acute myocardial infarction who had Thrombolysis In Myocardial Infarction 3 flow of the right coronary artery or left circumflex artery within 6 hours after symptom onset. The patients were divided according to the presence (n = 76) or absence (n = 281) of ST↑ >2 mm in leads V(5) and V(6). Patients with ST↑ in leads V(5) and V(6) were subdivided into 2 groups according to the degree of ST↑ in leads III and V(6): ST↑ in lead III greater than in V(6) (n = 53) and ST↑ in lead III equal to or less than in V(6) (n = 23). The perfusion territory of the culprit artery was assessed using the angiographic distribution score, and a mega-artery was defined as a score of ≥0.7. ST↑ in leads V(5) and V(6) with ST↑ in lead III greater than in V(6) and ST↑ in leads V(5) and V(6) with ST↑ in lead III equal to or less than in V(6) were associated with mega-artery occlusion and impaired myocardial reperfusion, as defined by myocardial blush grade 0 to 1. Right coronary artery occlusion was most common (96%) in the former, and left circumflex artery occlusion was most common (96%) in the latter, especially proximal left circumflex occlusion (74%). Multivariate analysis showed that ST↑ in leads V(5) and V(6) with ST↑ in lead III greater than that in V(6) (odds ratio 4.81, p <0.001) and ST↑ in leads V(5) and V(6) with ST↑ in lead III equal or less than that in V(6) (odds ratio 5.96, p <0.001) were independent predictors of impaired myocardial reperfusion. In conclusion, ST↑ in leads V(5) and V(6) suggests a greater risk area and impaired myocardial reperfusion in patients with inferior acute myocardial infarction. Furthermore, comparing the degree of ST↑ in lead V(6) with that in lead III is useful for predicting the culprit artery.
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Chen JW, Wang YL, Li HW. Elevated admission microalbuminuria predicts poor myocardial blood flow and 6-month mortality in ST-segment elevation myocardial infarction patients undergoing primary percutaneous coronary intervention. Clin Cardiol 2012; 35:219-24. [PMID: 22262165 DOI: 10.1002/clc.21005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Revised: 09/23/2011] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Microalbuminuria (MA) is considered a major risk factor predisposing to cardiovascular morbidity and mortality. Outcomes after percutaneous coronary intervention (PCI) for patients with acute myocardial infarction (AMI) complicated by MA have been well described. However, data regarding admission MA and coronary and myocardial flow are scant. The aims of this study were to evaluate the effects of admission MA on coronary blood flow and prognosis in ST-segment elevation myocardial infarction (STEMI) patients undergoing primary PCI. HYPOTHESIS Did elevated admission microalbuminuria predict poor myocardial blood flow and 6-month mortality in ST-segment elevation myocardial infarction patients undergoing primary percutaneous coronary intervention? METHODS A total of 247 patients undergoing primary PCI for STEMI within 12 hours after symptom onset were studied. Patients were divided into 2 groups according to admission urinary albumin extraction rate (UAER): (1) an MA group (UAER 20-200 µg/min), and (2) a normoalbuminuria (NA) group (UAER < 20 µg/min). RESULTS Microalbuminuria was observed in 108 patients. Univariate analyses showed statistical differences between the NA and MA groups in serum creatine level, plasma glucose level, and peak creatine kinase level on presentation. Thrombolysis In Myocardial Infarction (TIMI) flow grades (TFGs) 0-2 in the MA group were more frequent (9.4% vs 21.2%, P < 0.05) than in the NA group, and corrected TIMI frame count was higher (23.9 ± 18.5 vs 29.8 ± 23.5, P < 0.05). Admission MA was an independent predictor of poor myocardial perfusion (adjusted relative risk: 3.14, 95% confidence interval: 0.99-6.78) and a higher rate of 6-month mortality in STEMI patients undergoing primary PCI (adjusted relative risk: 1.58, 95% confidence interval: 0.74-3.39). CONCLUSIONS Admission MA levels are associated with impaired myocardial flow and poor prognosis in STEMI patients undergoing primary PCI.
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Affiliation(s)
- Jia Wei Chen
- Department of Cardiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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208
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Van Herck PL, Paelinck BP, Haine SE, Claeys MJ, Miljoen H, Bosmans JM, Parizel PM, Vrints CJ. Impaired coronary flow reserve after a recent myocardial infarction: correlation with infarct size and extent of microvascular obstruction. Int J Cardiol 2012; 167:351-6. [PMID: 22244483 DOI: 10.1016/j.ijcard.2011.12.099] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2011] [Revised: 10/30/2011] [Accepted: 12/24/2011] [Indexed: 10/14/2022]
Abstract
BACKGROUND The exact relationship between the coronary flow reserve (CFR) and infarct size remains unknown. In this prospective study the relationship between the CFR both in the infarcted and remote myocardium and infarct size was investigated. Furthermore, the diagnostic value of the CFR to predict the extent of microvascular obstruction (MO) was evaluated. METHODS In thirty patients the CFR was measured with a Doppler guide wire 6 ± 3 days after a first myocardial infarction (MI) in the infarct related and in a reference coronary artery. MO and infarct size were determined with magnetic resonance imaging. RESULTS The CFR was inversely related to infarct size in the infarcted and remote myocardium (respectively, r=-0.60, p<0.01 and r=-0.62, p<0.01). In the infarcted myocardium the extent of MO was strongly related to the infarct size and was in a multivariate analysis the single significant determinant of the CFR and the hyperaemic flow. In the remote myocardium no relationship was present between infarct size and hyperaemic flow, but the baseline flow increased as the infarct size became larger (r=0.58, p<0.01). In a receiver operator characteristic (ROC) analysis, a CFR value ≤ 2 in the infarct related coronary artery offered the best sensitivity (65%) and specificity (71%) to detect the presence of MO (p<0.05). CONCLUSIONS After MI, the CFR both in the infarcted and remote myocardium is inversely related to infarct size. In the infarcted myocardium, a CFR value ≤ 2 predicts the presence of MO with moderate sensitivity and specificity.
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Affiliation(s)
- P L Van Herck
- Department of Cardiology, Antwerp University Hospital, Wilrijkstraat 10, 2650 Edegem, Belgium.
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209
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Ikeda A, Inagaki M, Fukuzawa S, Sugioka J, Okino S, Maekawa J, Maekawa S, Ichikawa S, Uchiyama T, Kamioka N, Kuroiwa N. Contrast media injection into right coronary artery caused thrombus extraction to aorta that may have resulted in left main trunk thrombosis. Cardiovasc Interv Ther 2012; 27:37-42. [PMID: 24122640 DOI: 10.1007/s12928-011-0082-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Accepted: 08/01/2011] [Indexed: 11/26/2022]
Abstract
A 59-year-old man with inferior acute myocardial infarction underwent an urgent coronary angiography and as a result a total occlusion of the ostial right coronary artery (RCA) was observed. Interestingly, the thrombus in the RCA clearly shortened within 2.3 s during the contrast media injection. While we prepared for percutaneous coronary intervention (PCI) of the RCA, ventricular fibrillation occurred and pulseless electrical activity continued in spite of repeated cardioversion. Despite no stenosis in the left main trunk (LMT) in the initial coronary angiography, the LMT was totally occluded. Following aspiration therapy on the LMT with percutaneous cardiopulmonary support, PCI of the RCA was performed. A coronary angiography should be carefully performed if a lot of thrombi exist in the coronary ostium because LMT embolism may have been caused by thrombus extraction from the RCA by contrast media injection.
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Affiliation(s)
- Atsushi Ikeda
- Division of Cardiology, Heart and Vascular Institute, Funabashi Municipal Medical Center, 1-21-1 Kanasugi, Funabashi, 273-8588, Chiba, Japan,
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210
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van der Laan AM, Hirsch A, Robbers LF, Nijveldt R, Lommerse I, Delewi R, van der Vleuten PA, Biemond BJ, Zwaginga JJ, van der Giessen WJ, Zijlstra F, van Rossum AC, Voermans C, van der Schoot CE, Piek JJ. A proinflammatory monocyte response is associated with myocardial injury and impaired functional outcome in patients with ST-segment elevation myocardial infarction: monocytes and myocardial infarction. Am Heart J 2012; 163:57-65.e2. [PMID: 22172437 DOI: 10.1016/j.ahj.2011.09.002] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 09/03/2011] [Indexed: 10/15/2022]
Abstract
BACKGROUND In patients with ST-segment elevation myocardial infarction (STEMI), the importance of a well-balanced inflammatory reaction has been recognized for years. Monocytes play essential roles in regulating inflammation. Hence, we investigated the association between inflammatory characteristics of monocytes and myocardial injury and functional outcome in patients with STEMI. METHODS Using flow cytometry, the levels of classical (CD14(++)CD62L(+)) and nonclassical (CD14(+)CD62L(-)) monocytes were analyzed in peripheral blood in 58 patients with STEMI at a median of 5 days (4-6 days) after primary percutaneous coronary intervention. In addition, the monocytic expression of several surface molecules and formation of monocyte-platelet complexes were measured. All patients underwent cardiovascular magnetic resonance imaging at baseline and 4-month follow-up. RESULTS At baseline, patients with high levels of classical monocytes had impaired left ventricular (LV) ejection fraction (P = .002), larger infarct size (P = .001), and, often, presence of microvascular obstruction (P = .003). At follow-up, high levels of classical monocytes were negatively associated with the regional systolic LV function independent of the transmural extent of infarction. In contrast, positive associations for the levels of nonclassical monocytes were observed. Finally, up-regulation of macrophage 1 by blood monocytes and increased formation of monocyte-platelet complexes were associated with enhanced myocardial injury at baseline and impaired LV function at follow-up. CONCLUSIONS This study shows an association between a proinflammatory monocyte response, characterized by high levels of classical monocytes, and severe myocardial injury and poor functional outcome after STEMI. Future studies are required to investigate the biologic nature of this association and therapeutic implications.
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211
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Uchida Y, Ichimiya S, Ishii H, Kanashiro M, Watanabe J, Yoshikawa D, Takeshita K, Sakai S, Amano T, Matsubara T, Murohara T. Impact of Metabolic Syndrome on Various Aspects of Microcirculation and Major Adverse Cardiac Events in Patients With ST-Segment Elevation Myocardial Infarction. Circ J 2012; 76:1972-9. [DOI: 10.1253/circj.cj-11-1299] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yasuhiro Uchida
- Department of Cardiology, Nagoya University Graduate School of Medicine
| | | | - Hideki Ishii
- Department of Cardiology, Nagoya University Graduate School of Medicine
| | | | | | - Daiji Yoshikawa
- Department of Cardiology, Nagoya University Graduate School of Medicine
| | - Kyosuke Takeshita
- Department of Cardiology, Nagoya University Graduate School of Medicine
| | - Shinichi Sakai
- Department of Cardiology, Nagoya University Graduate School of Medicine
| | - Tetsuya Amano
- Department of Cardiology, Aichi Medical University School of Medicine
| | - Tatsuaki Matsubara
- Department of Internal Medicine, School of Dentistry Aichi Gakuin University
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine
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Galiuto L, Paraggio L, De Caterina AR, Fedele E, Locorotondo G, Leccisotti L, Giordano A, Rebuzzi AG, Crea F. Positron emission tomography in acute coronary syndromes. J Cardiovasc Transl Res 2011; 5:11-21. [PMID: 22170257 DOI: 10.1007/s12265-011-9332-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Accepted: 11/03/2011] [Indexed: 01/22/2023]
Abstract
Several imaging techniques have been used to assess cardiac structure and function, to understand pathophysiology, and to guide clinical decision making in the setting of acute coronary syndromes (ACS). Over the last years, cardiac positron emission tomography (PET) has affirmed its role in this setting. Indeed, the combined quantitative assessment of myocardial metabolism and perfusion has allowed to better understand the functional status of infarcted and non-infarcted myocardium, thus improving our knowledge of myocardial response to necrosis. More recently, several studies, taking advantage of previous observations in patients with cancer, have shown that PET could also provide important information on the mechanisms of vascular instability through the early identification of activated inflammatory cells in the atherosclerotic plaque. These findings are opening the way to more effective forms of prevention of acute vascular syndromes in high-risk patients; furthermore, new more sensitive and specific tracers for the identification of vascular inflammation are under development. In this review, we describe the potential and limitations of PET in the assessment of ACS.
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Affiliation(s)
- Leonarda Galiuto
- Institute of Cardiology, Catholic University of the Sacred Heart, Policlinico A. Gemelli, Largo A. Gemelli, 8, 00168, Rome, Italy.
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Effect of delayed vs immediate stent implantation on myocardial perfusion and cardiac function in patients with ST-segment elevation myocardial infarction undergoing primary percutaneous intervention with thrombus aspiration. Can J Cardiol 2011; 27:541-7. [PMID: 21963056 DOI: 10.1016/j.cjca.2011.03.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 02/15/2011] [Accepted: 03/01/2011] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Optimizing microcirculation in STEMI patients with thrombus-containing lesion undergoing percutaneous coronary intervention (PCI) remains challenging. Our objective was to compare the effects on myocardial perfusion and cardiac function of delayed vs immediate stent implantation after thrombus aspiration in STEMI patients undergoing PCI. METHODS Eighty-seven STEMI patients with thrombus-containing lesion undergoing PCI were enrolled. After thrombus aspiration was performed, subjects were divided into 2 groups according to residual thrombus score (TS): immediate stent implantation (ISI) group (n = 47, residual TS < 2; stenting was performed immediately), and delayed stent implantation (DSI) group (n = 40, residual TS ≥ 2; stenting was performed 7 days later). Corrected thrombolysis in myocardial infarction frame count and myocardial blush grade were analyzed immediately after PCI. The wall motion score index was assessed on admission and at 6-month follow-up. RESULTS At the end of the PCI procedure, the corrected thrombolysis in myocardial infarction frame count was significantly shorter and the myocardial blush grade 3 was more frequent in the DSI group than in the ISI group. Compared with the ISI group, the DSI group had a lower incidence of thrombus-related angiographic events, including distal embolization and no reflow. A significantly greater improvement in wall motion score index from baseline to 6-month follow-up was observed in the DSI group compared with the ISI group. CONCLUSIONS In STEMI patients presenting with thrombus containing lesion undergoing PCI, delayed stent implantation after thrombus aspiration leads to better myocardial perfusion and cardiac functional recovery in comparison with immediate stent implantation.
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214
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Madu EC, Potu C, Baugh D, Tulloch-Reid E. Myocardial Contrast Echocardiography in the Evaluation of Hypertensive Heart Disease. Cardiol Res 2011; 2:259-268. [PMID: 28352393 PMCID: PMC5358253 DOI: 10.4021/cr93w] [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] [Accepted: 09/23/2011] [Indexed: 11/20/2022] Open
Abstract
Myocardial contrast echocardiography (MCE) has an established role in left ventricular assessment by improving the ventricular opacification and endocardial border definition especially in patients with sub-optimal echocardiographic images. With advances in cardiac ultrasound imaging technology and the development of new contrast agents, the clinical utility of this technique has greatly expanded to include assessment of coronary reperfusion in the setting of acute myocardial infarction, determination of myocardial viability within infarct zones as well as assessment of coronary microcirculation and flow reserve in patients with microvascular coronary disease. Improvements in image quality with intravenous contrast agents can facilitate image acquisition and enhance delineation of regional wall motion abnormalities at peak levels of exercise. Numerous studies have confirmed the clinical utility of contrast enhancement during echocardiographic studies, particularly in patients undergoing stress testing. In this paper, we explore the evidence in support of MCE and its potential clinical applications. Our review aims to summarize (1) the basic principles of myocardial contrast echocardiography including recent advances in the ultrasound technology and contrast agents (2) its clinical applications in the diagnosis of cardiovascular diseases and finally, (3) its potential role in risk stratification and assessment of microvascular perfusion in patients with hypertensive heart disease.
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Affiliation(s)
- Ernest C Madu
- Department of Medicine, Division of Cardiovascular Medicine, Heart Institute of the Caribbean, Kingston, Jamaica; Center of Excellence for Cardiovascular Medicine and Sports Physiology, University of Technology, Kingston, Jamaica
| | - Chiranjivi Potu
- Department of Medicine, Division of Cardiovascular Medicine, Heart Institute of the Caribbean, Kingston, Jamaica; Center of Excellence for Cardiovascular Medicine and Sports Physiology, University of Technology, Kingston, Jamaica
| | - Dainia Baugh
- Department of Medicine, Division of Cardiovascular Medicine, Heart Institute of the Caribbean, Kingston, Jamaica; Center of Excellence for Cardiovascular Medicine and Sports Physiology, University of Technology, Kingston, Jamaica
| | - Edwin Tulloch-Reid
- Department of Medicine, Division of Cardiovascular Medicine, Heart Institute of the Caribbean, Kingston, Jamaica; Center of Excellence for Cardiovascular Medicine and Sports Physiology, University of Technology, Kingston, Jamaica
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215
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Akpek M, Kaya MG, Uyarel H, Yarlioglues M, Kalay N, Gunebakmaz O, Dogdu O, Ardic I, Elcik D, Sahin O, Oguzhan A, Ergin A, Gibson CM. The association of serum uric acid levels on coronary flow in patients with STEMI undergoing primary PCI. Atherosclerosis 2011; 219:334-41. [DOI: 10.1016/j.atherosclerosis.2011.07.021] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 06/11/2011] [Accepted: 07/10/2011] [Indexed: 11/17/2022]
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216
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Xie F, Slikkerveer J, Gao S, Lof J, Kamp O, Unger E, Radio S, Matsunaga T, Porter TR. Coronary and microvascular thrombolysis with guided diagnostic ultrasound and microbubbles in acute ST segment elevation myocardial infarction. J Am Soc Echocardiogr 2011; 24:1400-8. [PMID: 22037348 DOI: 10.1016/j.echo.2011.09.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Indexed: 10/15/2022]
Abstract
BACKGROUND During a microbubble infusion, guided high-mechanical index impulses from a diagnostic two-dimensional transducer improve microvascular recanalization in acute ST-segment elevation myocardial infarction. The purpose of this study was to further elucidate the mechanism of improved microvascular flow in normal and hyperlipidemic atherosclerotic pigs. METHODS In 14 otherwise normal pigs, acute left anterior descending thrombotic coronary occlusions were created. Pigs subsequently received aspirin, heparin, and half-dose fibrinolytic agent (tenecteplase or tissue plasminogen activator), followed by randomization to either no additional treatment (group I) or a continuous infusion of nontargeted microbubbles and guided high-mechanical index impulses from a three-dimensional transducer (group II). Epicardial recanalization rates, ST-segment resolution, microsphere-derived myocardial blood flow, and ultimate infarct size using myocardial contrast echocardiography were compared. The same coronary thrombosis was created in a set of 12 hypercholesterolemic pigs, which were then treated with the same pharmacologic and ultrasound regimen (group III, n = 6) or the pharmacologic regimen alone (group IV, n = 6). RESULTS Epicardial recanalization rates in groups I and II were the same (29%), but peri-infarct myocardial blood flow and ultimate infarct size improved after treatment in group II (P < .01 vs group I). In group III, epicardial recanalization was 100% (vs. 50% in group IV), and there were significant reductions in ultimate infarct size (P = .02 compared with group IV). CONCLUSIONS Guided high-mechanical index impulses from a diagnostic transducer and nontargeted microbubbles improve peri-infarct microvascular flow in acute ST-segment elevation myocardial infarction, even when epicardial recanalization does not occur.
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Affiliation(s)
- Feng Xie
- University of Nebraska Medical Center, Omaha, Nebraska, USA
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217
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Suzuki M, Enomoto D, Seike F, Fujita S, Honda K. Clinical features of early myocardial rupture of acute myocardial infarction. Angiology 2011; 63:453-6. [PMID: 22007028 DOI: 10.1177/0003319711422536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We assessed the clinical features of patients with myocardial rupture within 48 to 72 hours, defined as early myocardial rupture, after percutaneous coronary intervention (PCI) for ST-segment elevation acute myocardial infarction (STEMI). Six patients (4 men, 66 ± 13 years) with early myocardial rupture were identified from 1252 consecutive patients undergoing PCI for STEMI. We evaluated the degree of microvascular reperfusion using thrombolysis in myocardial infarction (TIMI) myocardial perfusion (TMP) grade and a resolution of sum of ST-segment elevation in a 12-lead electrocardiogram (ECG). Time from PCI to myocardial rupture was 11 ± 7 hours. All patients showed TMP grade 0 or 1 and an increase in sum of ST-segment elevation after PCI (1.9 ± 0.5 vs 2.5 ± 0.7 mV; P = .032), suggesting severely failed reperfusion at the level of microcirculation as the common feature to develop early myocardial rupture after PCI for STEMI.
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Affiliation(s)
- Makoto Suzuki
- Section of Cardiology, Department of Community Emergency Medicine, Ehime University Graduate School of Medicine, Toon, Japan.
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Bochenek T, Wita K, Tabor Z, Grabka M, Krzych Ł, Wróbel W, Berger-Kucza A, Elżbieciak M, Doruchowska A, Gluza MT. Value of speckle-tracking echocardiography for prediction of left ventricular remodeling in patients with ST-elevation myocardial infarction treated by primary percutaneous intervention. J Am Soc Echocardiogr 2011; 24:1342-8. [PMID: 22000785 DOI: 10.1016/j.echo.2011.09.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2010] [Indexed: 02/08/2023]
Abstract
BACKGROUND Left ventricular remodeling (LVr) is still common after ST-segment elevation myocardial infarction (STEMI). Early predictors of remodeling are being investigated. The aims of this study were to evaluate the prognostic value of speckle-tracking echocardiography for the prediction of LVr 3 months after primary percutaneous coronary intervention in patients with STEMI and to analyze the relationship between values of peak longitudinal strain of particular LV segments and relative changes of their subvolumes. METHODS Patients with first STEMI were enrolled. Baseline enzymes were collected, and electrocardiography and echocardiography (transthoracic echocardiography, speckle-tracking echocardiography, and three-dimensional studies) were preformed. Three months after myocardial infarction, two-dimensional and three-dimensional ultrasonographic studies were done. RESULTS Sixty-six patients were divided into two groups: 44 patients without LVr and 22 patients with LVr. Among 31 patients with anterior wall STEMI, the rate of LVr was 42%. On the basis of assessments of baseline and follow-up myocardial wall contractility, 1,041 segments were analyzed. All segments were divided into normal (n = 842), reversibly dysfunctional (n = 68), and irreversibly dysfunctional (n = 131). Receiver operating characteristic curve analysis showed that global longitudinal strain predicted LVr with an optimal cutoff value of -12.5% (area under the curve, 0.77). In multivariate analysis, diabetes mellitus (odds ratio, 4.61; 95% confidence interval, 1.19-18.02) and global longitudinal strain (odds ratio, 1.19; 95% confidence interval, 1.04-1.37) were determinants of LVr. Positive correlations were found between peak longitudinal strain and changes in subvolumes for all segments (R = 0.11, P = .005) and for those irreversibly dysfunctional (R = 0.22, P = .04). CONCLUSIONS In patients with STEMI treated by primary percutaneous coronary intervention, the frequency of LVr during 3-month follow-up was high and mainly affected the population with anterior wall myocardial infarction. The results of this study show the clinical value of global longitudinal strain measured by speckle-tracking echocardiography in the prediction of LVr. A moderate correlation was found between the value of peak longitudinal strain and changes in subvolumes attributed to irreversibly dysfunctional segments.
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Affiliation(s)
- Tomasz Bochenek
- Department of Cardiology, Medical University of Silesia, Katowice, Poland.
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219
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Khan AM, Litt H, Ferrari V, Han Y. Cardiac Magnetic Resonance Imaging in Ischemic Heart Disease. PET Clin 2011; 6:453-73. [DOI: 10.1016/j.cpet.2011.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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220
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Stenberg TA, Steigen T, Myrmel T. Microvascular occlusions and coronary microembolization. SCAND CARDIOVASC J 2011; 45:258-60. [PMID: 21879801 DOI: 10.3109/14017431.2011.613202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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221
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A patient with significant slow-flow phenomenon during percutaneous coronary intervention for ST elevation myocardial infarction associated with scattered necrotic core by virtual histology intravascular ultrasound. Cardiovasc Interv Ther 2011; 26:290-5. [PMID: 24122600 DOI: 10.1007/s12928-011-0073-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Accepted: 05/27/2011] [Indexed: 10/18/2022]
Abstract
A 68-year-old man with acute ST elevation myocardial infarction (STEMI) underwent emergent coronary angiography which showed total occlusion in the proximal right coronary artery (RCA). Gray-scale intravascular ultrasound (IVUS) revealed the culprit lesion was expansively remodeled and contained ruptured and echolucent plaques with spotty calcification, whereas thin-capped fibroatheroma and a large amount of scattered necrotic core were observed by virtual histology (VH)-IVUS. After stent implantation in the proximal RCA under a filter protection, filter-no-reflow phenomenon occurred and thrombus-like defect was observed in the mid RCA. Under these conditions, VH-IVUS detected a large amount of scattered necrotic core in the mid RCA. We suggest scattered necrotic core detected by VH-IVUS may be associated with slow-flow phenomenon during percutaneous coronary intervention in our patient with STEMI.
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Ishii H, Amano T, Matsubara T, Murohara T. Pharmacological prevention of peri-, and post-procedural myocardial injury in percutaneous coronary intervention. Curr Cardiol Rev 2011; 4:223-30. [PMID: 19936199 PMCID: PMC2780824 DOI: 10.2174/157340308785160598] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2008] [Revised: 05/09/2008] [Accepted: 05/09/2008] [Indexed: 02/02/2023] Open
Abstract
In recent years, percutaneous coronary intervention (PCI) has become a well-established technique for the treatment of coronary artery disease. PCI improves symptoms in patients with coronary artery disease and it has been increasing safety of procedures. However, peri- and post-procedural myocardial injury, including angiographical slow coronary flow, microvascular embolization, and elevated levels of cardiac enzyme, such as creatine kinase and troponin-T and -I, has also been reported even in elective cases. Furthermore, myocardial reperfusion injury at the beginning of myocardial reperfusion, which causes tissue damage and cardiac dysfunction, may occur in cases of acute coronary syndrome. Because patients with myocardial injury is related to larger myocardial infarction and have a worse long-term prognosis than those without myocardial injury, it is important to prevent myocardial injury during and/or after PCI in patients with coronary artery disease. To date, many studies have demonstrated that adjunctive pharmacological treatment suppresses myocardial injury and increases coronary blood flow during PCI procedures. In this review, we highlight the usefulness of pharmacological treatment in combination with PCI in attenuating myocardial injury in patients with coronary artery disease.
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Affiliation(s)
- Hideki Ishii
- Department of Cardiology, Nagoya University Graduate School of Medicine
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Pierrakos CN, Bonios MJ, Drakos SG, Charitos EI, Tsolakis EJ, Ntalianis A, Nanas SN, Charitos CE, Nanas JN, Terrovitis JV. Mechanical Assistance by Intra-Aortic Balloon Pump Counterpulsation During Reperfusion Increases Coronary Blood Flow and Mitigates the No-Reflow Phenomenon: An Experimental Study. Artif Organs 2011; 35:867-74. [DOI: 10.1111/j.1525-1594.2011.01241.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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A multicenter, randomized, controlled study of mechanical left ventricular unloading with counterpulsation to reduce infarct size prepercutaneous coronary intervention for acute myocardial infarction: rationale and design of the Counterpulsation Reduces Infarct Size Acute Myocardial Infarction trial. Am Heart J 2011; 162:47-55.e1. [PMID: 21742089 DOI: 10.1016/j.ahj.2011.03.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Accepted: 03/27/2011] [Indexed: 11/21/2022]
Abstract
BACKGROUND Despite advances in care processes to improve reperfusion in patients with acute myocardial infarction (AMI), the short-term and 1-year mortality remains high, in part, because of reperfusion injury, microvascular obstruction, and infarct expansion. Intraaortic balloon counterpulsation (IABC) is an adjunct to revascularization and has reduced microvascular obstruction and infarct size in animal models of AMI. METHODS CRISP AMI is a multicenter randomized trial that aims to determine if IABC initiated before percutaneous coronary intervention (PCI) for reperfusion compared with routine PCI in patients with anterior ST-segment elevation AMI reduces infarct size as measured by cardiac magnetic resonance imaging. Patients are randomly assigned to receive IABC initiated before primary PCI and continued for at least 12 hours or routine PCI with standard-of-care medical therapy in both groups. The primary efficacy end point is infarct size measured by cardiac magnetic resonance imaging at 3 to 5 days post-PCI. The secondary clinical end point is the composite of major adverse clinical events including death, reinfarction, and heart failure at 6 months. According to sample size calculation, 300 patients will be randomized at 50 sites across 10 countries. CONCLUSION The CRISP AMI study will determine if IABC before reperfusion in patients with anterior AMI reduces infarct size.
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Zhao JL, Fan CM, Yang YJ, You SJ, Gao X, Zhou Q, Pei WD. Chronic Pretreatment of Metformin is Associated with the Reduction of the No-Reflow Phenomenon in Patients with Diabetes Mellitus After Primary Angioplasty for Acute Myocardial Infarction. Cardiovasc Ther 2011; 31:60-4. [DOI: 10.1111/j.1755-5922.2011.00294.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Perrelli MG, Pagliaro P, Penna C. Ischemia/reperfusion injury and cardioprotective mechanisms: Role of mitochondria and reactive oxygen species. World J Cardiol 2011; 3:186-200. [PMID: 21772945 PMCID: PMC3139040 DOI: 10.4330/wjc.v3.i6.186] [Citation(s) in RCA: 236] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Revised: 05/11/2011] [Accepted: 05/18/2011] [Indexed: 02/06/2023] Open
Abstract
Reperfusion therapy must be applied as soon as possible to attenuate the ischemic insult of acute myocardial infarction (AMI). However reperfusion is responsible for additional myocardial damage, which likely involves opening of the mitochondrial permeability transition pore (mPTP). In reperfusion injury, mitochondrial damage is a determining factor in causing loss of cardiomyocyte function and viability. Major mechanisms of mitochondrial dysfunction include the long lasting opening of mPTPs and the oxidative stress resulting from formation of reactive oxygen species (ROS). Several signaling cardioprotective pathways are activated by stimuli such as preconditioning and postconditioning, obtained with brief intermittent ischemia or with pharmacological agents. These pathways converge on a common target, the mitochondria, to preserve their function after ischemia/reperfusion. The present review discusses the role of mitochondria in cardioprotection, especially the involvement of adenosine triphosphate-dependent potassium channels, ROS signaling, and the mPTP. Ischemic postconditioning has emerged as a new way to target the mitochondria, and to drastically reduce lethal reperfusion injury. Several clinical studies using ischemic postconditioning during angioplasty now support its protective effects, and an interesting alternative is pharmacological postconditioning. In fact ischemic postconditioning and the mPTP desensitizer, cyclosporine A, have been shown to induce comparable protection in AMI patients.
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Affiliation(s)
- Maria-Giulia Perrelli
- Maria-Giulia Perrelli, Pasquale Pagliaro, Claudia Penna, Department of Clinical and Biological Sciences, University of Turin, 10043 Orbassano, Italy
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Elevated plasma asymmetric dimethylarginine level in acute myocardial infarction patients as a predictor of poor prognosis and angiographic impaired reperfusion. Atherosclerosis 2011; 219:304-10. [PMID: 21726864 DOI: 10.1016/j.atherosclerosis.2011.06.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 06/12/2011] [Accepted: 06/12/2011] [Indexed: 11/22/2022]
Abstract
OBJECTIVES We aimed to investigate the effects of admission asymmetric dimethylarginine (ADMA) levels on myocardial perfusion and prognosis in ST-segment elevation myocardial infarction (STEMI) patients undergoing primary percutaneous coronary intervention (PCI). BACKGROUND ADMA, an endogenous inhibitor of endothelial nitric oxide synthase, was found to be elevated in plasma of patients with cardiovascular risk factors. METHODS 168 consecutive patients undergoing primary PCI for STEMI <12 h after symptom onset and 75 healthy age and sex matched volunteer controls were enrolled in the study. Patients with STEMI were grouped into tertiles according to their admission plasma ADMA levels. Major adverse cardiac events during hospitalization or at one-year clinical follow-up were evaluated. Also angiographic impaired reperfusion was assessed by 3 different methods after PCI: angiographic thrombolysis in myocardial infarction (TIMI) flow, TIMI frame count and TIMI myocardial perfusion grade (TMPG). RESULTS Plasma level of L-arginine were lower in patients with STEMI than in the control group subjects, whereas plasma ADMA levels were increased in the STEMI patient group. The rate of impaired angiographic reperfusion increased across the tertile groups. Also one-year mortality rates showed a significant increase across the tertile groups (4% vs. 10% vs. 20%, p<0.01). Using multiple Cox regression analysis, only TIMI risk score, left ventricle ejection fraction (LVEF), abnormal TMPG, and increased ADMA values on admission emerged as independent predictors of one-year mortality. The ROC analysis indicated an optimal cut-point of ≥1.37 μmol/L, which detects one-year mortality with a negative predictive value of 96%. CONCLUSIONS In STEMI patients undergoing primary PCI, high admission ADMA levels were found to be associated with impaired myocardial perfusion and increased one-year mortality. Therefore admission ADMA level detection may be helpful in identifying the patients at a greater risk of impaired myocardial perfusion and poor prognosis.
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228
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Butler MJ, Chan W, Taylor AJ, Dart AM, Duffy SJ. Management of the no-reflow phenomenon. Pharmacol Ther 2011; 132:72-85. [PMID: 21664376 DOI: 10.1016/j.pharmthera.2011.05.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Accepted: 05/12/2011] [Indexed: 01/03/2023]
Abstract
The lack of reperfusion of myocardium after prolonged ischaemia that may occur despite opening of the infarct-related artery is termed "no reflow". No reflow or slow flow occurs in 3-4% of all percutaneous coronary interventions, and is most common after emergency revascularization for acute myocardial infarction. In this setting no reflow is reported to occur in 30% to 40% of interventions when defined by myocardial perfusion techniques such as myocardial contrast echocardiography. No reflow is clinically important as it is independently associated with increased occurrence of malignant arrhythmias, cardiac failure, as well as in-hospital and long-term mortality. Previously the no-reflow phenomenon has been difficult to treat effectively, but recent advances in the understanding of the pathophysiology of no reflow have led to several novel treatment strategies. These include prophylactic use of vasodilator therapies, mechanical devices, ischaemic postconditioning and potent platelet inhibitors. As no reflow is a multifactorial process, a combination of these treatments is more likely to be effective than any of these alone. In this review we discuss the pathophysiology of no reflow and present the numerous recent advances in therapy for this important clinical problem.
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Affiliation(s)
- Michelle J Butler
- Department of Cardiovascular Medicine, the Alfred Hospital, Melbourne, Australia
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Han B, Zhang X, Zhang Q, Zhao G, Wei J, Ma S, Zhu W, Wei M. Protective effects of salvianolate on microvascular flow in a porcine model of myocardial ischaemia and reperfusion. Arch Cardiovasc Dis 2011; 104:313-24. [PMID: 21693368 DOI: 10.1016/j.acvd.2011.02.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 02/14/2011] [Accepted: 02/22/2011] [Indexed: 11/25/2022]
Abstract
BACKGROUND Microvascular reflow is crucial for myocyte survival during ischaemia/reperfusion injury. AIMS We aimed to assess if salvianolate, a highly purified aqueous extract from Radix salviae miltiorrhizae, could improve impaired microvascular reflow induced by ischaemia/reperfusion injury, using a porcine closed-chest model. METHODS Left anterior descending coronary artery ligation was created by balloon occlusion for 2 h followed by reperfusion for 14 days. Salvianolate was administrated intravenously for 7 days at low dose (5 mg/kg/day), high dose (10 mg/kg/day) or high dose combined with one 20 mg intracoronary bolus injection just at the beginning of reperfusion. Control-group animals were only given the same volume of saline. RESULTS After 14 days of reperfusion, animals treated with high-dose salvianolate showed improved myocardial perfusion assessed by real-time myocardial contrast echocardiography and coloured microspheres. The beneficial effect was further supported by increased capillary density and decreased infarct size. All these effects eventually resulted in well-preserved cardiac function detected by echocardiography. Moreover, we also demonstrated that salvianolate administration was associated with elevated superoxide dismutase activity, thioredoxin activity and glutathione concentration, and reduced malondialdehyde concentration, which, in turn, resulted in a significant decrease in terminal deoxynucleotide transferase-mediated dUTP nick end labelling-positive cells and an increased ratio of Bcl-2 to Bax expression. CONCLUSION Intravenous salvianolate at a dose of 10 mg/kg/day for 7 days had significant beneficial effects on myocardial microvascular reflow, which were associated with decreased oxidative stress and apoptosis.
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Affiliation(s)
- Beibei Han
- Division of Cardiology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University School of Medicine, China
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Abstract
Contemporary management of coronary artery disease relies increasingly on percutaneous techniques combined with medical therapy. Although percutaneous coronary intervention (PCI) can be performed successfully in most lesions, several difficult lesion subsets continue to present unique technical challenges. These complex lesions may be classified according to anatomic criteria, including extensive calcification, thrombus, and chronic occlusions, or by location, such as bifurcations, saphenous vein grafts and unprotected left main. PCI of these lesions often requires novel devices, such as drug-eluting stents, hydrophilic guidewires, distal protection balloons or filters, thrombectomy catheters, rotational atherectomy, and cutting balloons. An integrated approach that combines these devices with specialized techniques and adjunctive pharmacologic agents has greatly improved PCI success rates for these complex lesions.
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Sadauskiene E, Zakarkaite D, Ryliskyte L, Celutkiene J, Rudys A, Aidietiene S, Laucevicius A. Non-invasive evaluation of myocardial reperfusion by transthoracic Doppler echocardiography and single-photon emission computed tomography in patients with anterior acute myocardial infarction. Cardiovasc Ultrasound 2011; 9:16. [PMID: 21619676 PMCID: PMC3123269 DOI: 10.1186/1476-7120-9-16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Accepted: 05/28/2011] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND The study was designed to evaluate whether the preserved coronary flow reserve (CFR) 72 hours after reperfused acute myocardial infarction (AMI) is associated with less microvascular dysfunction and is predictive of left ventricular (LV) functional recovery and the final infarct size at follow-up. METHODS In our study, CFR was assessed by transthoracic Doppler echocardiography (TDE) in 44 patients after the successful percutaneous coronary intervention during the acute AMI phase. CFR was correlated with contractile reserve assessed by low-dose dobutamine echocardiography and with the total perfusion defect measured by single-photon emission computed tomography 72 hours after reperfusion and at 5 months follow-up. The ROC analysis was performed to determine test sensitivity and specificity based on CFR. Categorical data were compared by an χ² analysis, continuous variables were analysed with the independent Student's t test. In order to analyse correlation between CFR and the parameters of LV function and perfusion, the Pearson correlation analysis was conducted. The linear regression analysis was used to assess the relationship between CFR and myocardial contractility as well as the final infarct size. RESULTS We estimated the CFR cut-off value of 1.75 as providing the maximal accuracy to distinguish between patients with preserved and impaired CFR during the acute AMI phase (sensitivity 91.7%, specificity 75%). Wall motion score index was better in the subgroup with preserved CFR as compared to the subgroup with reduced CFR: 1.74 (0.29) vs. 1.89 (0.17) (p < 0.001) during the acute phase and 1.47 (0.30) vs. 1.81 (0.20) (p < 0.001) at follow-up, respectively. LV ejection fraction was 47.78% (8.99) in preserved CFR group vs. 40.79% (7.25) in impaired CFR group (p = 0.007) 72 hours after reperfusion and 49.78% (8.70) vs. 40.36% (7.90) (p = 0.001) after 5 months at follow-up, respectively. The final infarct size was smaller in patients with preserved as compared to patients with reduced CFR: 5.26% (6.14) vs. 23.28% (12.19) (p < 0.001) at follow-up. CONCLUSION The early measurement of CFR by TDE can be of high value for the assessment of successful reperfusion in AMI and can be used to predict LV functional recovery, myocardial viability and the final infarct size.
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Affiliation(s)
- Egle Sadauskiene
- Department of Cardiovascular Medicine, Vilnius University Hospital Santariskiu Klinikos, Santariskiu 2, Vilnius, LT-08661, Lithuania
- Clinic of Cardiac and Vascular Diseases, Faculty of Medicine, Vilnius University, M.K. Ciurlionio 21, Vilnius, LT-03101, Lithuania
| | - Diana Zakarkaite
- Department of Cardiovascular Medicine, Vilnius University Hospital Santariskiu Klinikos, Santariskiu 2, Vilnius, LT-08661, Lithuania
- Clinic of Cardiac and Vascular Diseases, Faculty of Medicine, Vilnius University, M.K. Ciurlionio 21, Vilnius, LT-03101, Lithuania
| | - Ligita Ryliskyte
- Department of Cardiovascular Medicine, Vilnius University Hospital Santariskiu Klinikos, Santariskiu 2, Vilnius, LT-08661, Lithuania
- Clinic of Cardiac and Vascular Diseases, Faculty of Medicine, Vilnius University, M.K. Ciurlionio 21, Vilnius, LT-03101, Lithuania
| | - Jelena Celutkiene
- Department of Cardiovascular Medicine, Vilnius University Hospital Santariskiu Klinikos, Santariskiu 2, Vilnius, LT-08661, Lithuania
- Clinic of Cardiac and Vascular Diseases, Faculty of Medicine, Vilnius University, M.K. Ciurlionio 21, Vilnius, LT-03101, Lithuania
| | - Alfredas Rudys
- Department of Cardiovascular Medicine, Vilnius University Hospital Santariskiu Klinikos, Santariskiu 2, Vilnius, LT-08661, Lithuania
- Clinic of Cardiac and Vascular Diseases, Faculty of Medicine, Vilnius University, M.K. Ciurlionio 21, Vilnius, LT-03101, Lithuania
| | - Sigita Aidietiene
- Department of Cardiovascular Medicine, Vilnius University Hospital Santariskiu Klinikos, Santariskiu 2, Vilnius, LT-08661, Lithuania
- Clinic of Cardiac and Vascular Diseases, Faculty of Medicine, Vilnius University, M.K. Ciurlionio 21, Vilnius, LT-03101, Lithuania
| | - Aleksandras Laucevicius
- Department of Cardiovascular Medicine, Vilnius University Hospital Santariskiu Klinikos, Santariskiu 2, Vilnius, LT-08661, Lithuania
- Clinic of Cardiac and Vascular Diseases, Faculty of Medicine, Vilnius University, M.K. Ciurlionio 21, Vilnius, LT-03101, Lithuania
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Messas M, Trinh A, Jesel L, Radulescu B, Germain P, Ohlmann P, Bareiss P, Morel O. [Usefulness of diastolic deceleration time assessed by transthoracic Doppler measurement in the detection of sustained microvascular obstruction in STEMI patients treated by primary PTCA]. Ann Cardiol Angeiol (Paris) 2011; 60:119-26. [PMID: 21570057 DOI: 10.1016/j.ancard.2010.12.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Accepted: 12/28/2010] [Indexed: 11/25/2022]
Abstract
AIMS To assess the value of coronary flow measurement by transthoracic Doppler technique in the detection of "no-reflow" phenomenon. METHODS Fourteen patients with first anterior wall infarction treated by successful (TIMI3) primary percutaneous angioplasty and left descending coronary artery stenting were investigated. Myocardial perfusion following PCI was assessed by (i) ST-segment resolution, (ii) MRI-detected microvascular obstruction (early hypoenhancement), (iii) coronary flow pattern measurement by transthoracic Doppler technique. RESULTS Sustained impairment of myocardial perfusion following PCI was observed in a large proportion of the cohort (36% by MRI, 43% by ST regression analysis). Patients with a diastolic deceleration time inferior to 482 ms had higher troponin and CK peak value, higher wall motion index score, lower ST resolution and lower LVEF assessed by MRI. The concordance of the three methods was 80%. CONCLUSION The measurement of diastolic deceleration time by transthoracic Doppler technique is a reliable technique to identify microvascular obstruction following PCI in acute anterior STEMI. A DDT inferior to 482 ms is associated with sustained "no-reflow" phenomenon.
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Affiliation(s)
- M Messas
- Pôle d'activité médicochirurgicale des Hôpitaux universitaires de Strasbourg, Nouvel Hôpital Civil, université de Strasbourg, France
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Pioud V, Lorgis L, Collin B, Garnier N, Guenfoudi MP, Richard C, Zeller M, Guignard MH, Rochette L, Cottin Y. Coronary thrombectomy, technical comparison of two systems on a laboratory bench: the impact of bends, angles and thrombus age. EUROINTERVENTION 2011; 6:729-34. [PMID: 21205596 DOI: 10.4244/eijv6i6a123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIMS Despite the results of recent randomised studies, the systematic use of aspiration techniques in ST-elevation myocardial infarction has not been included in the new guidelines. To date, there have been very few bench tests of the different systems and the aim of our study was to test two catheters on different models of arteries with thrombi at six and 12 hours. METHODS AND RESULTS The test apparatus consisted of 3 mm diameter glass tubes of 150 mm in length. The thrombi were left for either six or 12 hours and ten models of tubes were used: straight, with a single bend and with two bends. Two types of catheters were tested: the Export® aspiration catheter (EAC) and the Proxis® embolic protection system (PES). The main assessment criterion was total thrombectomy. Total thrombectomy was achieved in only 55.3% of the tests and no difference appeared between the two systems. Total thrombectomy was achieved more frequently with 6-hour thrombi than with 12-hour thrombi for the two techniques, 62.5% vs. 42.5% (p = 0.018) and 67.5% vs. 48.7% (p = 0.025) for EAC and PES catheter, respectively. In contrast, total thrombectomy was more frequent in straight tubes and in tubes with a single bend than in tubes with double bends, respectively for EAC (64% vs. 44.8%, p = 0.028) and for PES (85.9% vs. 35.4%, p < 0.001). CONCLUSIONS The use of thrombectomy in the invasive management of acute coronary syndromes is growing. Our work on a "laboratory bench" reveals important technical differences. In consequence, in clinical practice, we speculate that the catheter system must be chosen according to both the artery anatomy and the delay between chest pain and PCI.
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234
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van Gaal WJ, Banning AP. Thrombectomy and Embolic Protection. Interv Cardiol 2011. [DOI: 10.1002/9781444319446.ch22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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No Reflow. Interv Cardiol 2011. [DOI: 10.1002/9781444319446.ch28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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236
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Predictive value of ischemic mitral regurgitation during the acute phase of ST elevation myocardial infarction treated with primary coronary intervention for left ventricular remodeling in long-term follow-up. Coron Artery Dis 2011; 21:325-9. [PMID: 20453641 DOI: 10.1097/mca.0b013e32833aa6bb] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
UNLABELLED Reperfusion therapy, mainly primary percutaneous coronary intervention (PCI), has improved survival and lowered complication rate in patients with ST elevation myocardial infarction (STEMI). Nevertheless, some patients develop left ventricular remodeling (LVR) during long-term follow-up. AIMS To assess the incidence of ischemic mitral regurgitation (MR) in the acute phase of STEMI treated with primary PCI. To assess prognostic value of MR during acute STEMI for prediction of LVR during long-term follow-up. METHODS This is a prospective, single-center study in 83 patients with the first STEMI. Inclusion criteria were as follows: time from symptom onset to PCI less than 12 h and successful restoration of blood flow (thrombolysis in myocardial infarction 3) in the infarct-related coronary artery. Transthoracic echocardiography was performed at discharge and 6 months after the MI. RESULTS At hospital discharge, ischemic MR was found in 35 (42%) patients. At 6 months follow-up, LVR was present in 21 (25%) patients. Univariate analysis revealed that remodeling could be predicted by age, weight, treatment with abciximab, left ventricular ejection fraction (LVEF), leaflets coaptation, coaptation height, tenting area, presence of MR, degree of MR. The best multivariate logistic regression model for remodeling prediction at 6 months was combination of ischemic MR degree (odds ratio (OR)=14.5; 95% confidence interval (CI): 3.89-54.0, P<0.00005), abciximab therapy (OR=0.09; 95% CI: 0.01-0.84, P<0.03) and LVEF (OR=0.89; 95% CI: 0.81-0.99, P<0.03). CONCLUSION Ischemic MR in STEMI is frequent, even despite effective primary PCI. The regurgitation grade and lower LVEF assessed at hospital discharge and lack of abciximab administration could predict development of LVR at 6 months.
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New method of intracoronary adenosine injection to prevent microvascular reperfusion injury in patients with acute myocardial infarction undergoing percutaneous coronary intervention. Am J Cardiol 2011; 107:1131-5. [PMID: 21310372 DOI: 10.1016/j.amjcard.2010.12.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2010] [Revised: 12/15/2010] [Accepted: 12/15/2010] [Indexed: 12/29/2022]
Abstract
The aim of our study was to examine the role of a new, simple protocol of intracoronary adenosine administration performed during primary angioplasty on the immediate angiographic results and clinical course. A prospective, single-center, randomized, placebo-controlled trial of 70 consecutive patients (64 ± 14 years, 54 men) with acute myocardial infarction with ST-segment elevation undergoing primary percutaneous coronary intervention (PCI) was conducted. Patients were randomized to 2 groups. Group 1 (n = 35) received intracoronary adenosine (1 to 2 mg) with a hand injection through the guiding catheter 2 times: immediately after crossing the lesion of the infarct-related artery with guidewire and then after the first balloon inflation. Group 2 (n = 35) received placebo. The baseline clinical and angiographic characteristics of the 2 groups were similar. Percutaneous coronary intervention resulted in Thrombolysis In Myocardial Infarction grade 3 flow after PCI in 32 patients (91.4%) in the adenosine group and 27 patients (77.1%) in the placebo group (p = 0.059). Myocardial blush grade 3 was observed at the end of PCI in 23 patients (65.7%) in the adenosine group and 13 (37.1%) in the placebo group (p < 0.05). Resolution of ST-segment elevation (> 50%) was more frequently observed in the adenosine than in the placebo group: 27 (77%) versus 15 (43%), respectively (p < 0.01). In conclusion, intracoronary adenosine administration improved the angiographic and electrocardiographic results in patients with acute myocardial infarction with ST-segment elevation undergoing PCI. Adenosine administration seemed to be associated with a more favorable clinical course.
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238
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Dong-bao L, Qi H, Zhi L, Shan W, Wei-ying J. Predictors and long-term prognosis of angiographic slow/no-reflow phenomenon during emergency percutaneous coronary intervention for ST-elevated acute myocardial infarction. Clin Cardiol 2011; 33:E7-12. [PMID: 21184547 DOI: 10.1002/clc.20634] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE Angiographic slow/no-reflow during emergency percutaneous coronary intervention (PCI) in patients with ST-elevated acute myocardial infarction (AMI) may result in unfavorable outcomes. The aim of our study was to investigate the clinical factors and angiographic findings that predict slow/no-reflow phenomenon and the long-term prognosis of AMI patients with angiographic slow/no-reflow. METHODS A total of 210 consecutive AMI patients, who underwent primary PCI within 12 hours of symptom onset were divided into a normal flow group (thrombolysis in myocardial infarction [TIMI] flow grade 3, n = 169) and a slow/no-reflow group (≤TIMI flow grade 2, n = 41), based on cineangiograms performed during PCI. RESULTS A total of 41 patients (19.5%) developed slow/no-reflow phenomenon. Univariate analysis showed that delayed reperfusion, high thrombus burden on baseline angiography, and acute hyperglycemia all correlated with slow/no-reflow (P < 0.05 for all). Multivariate analysis revealed that hyperglycemia on admission (≥10 mmol/L; odds ratio [OR]: 1.7, 95% confidence interval [CI]: 1.423-2.971, P = 0.012), reperfusion time (≥6 h; OR:1.4, 95% CI: 1.193-1.695, P = 0.040), and high thrombus burden (OR: 1.6, 95% CI: 1.026-2.825, P = 0.031) were significant and independent predictors of angiographic slow/no-reflow. The 6-month mortality and incidence of major adverse cardiac and cerebrovascular events (MACCE) were significantly higher in the slow/no-reflow group than in the normal flow group. Angiographic slow/no-reflow was independently predictive of MACCE (hazard ratio [HR]: 2.642, 95% CI: 1.304-5.932, P = 0.028). CONCLUSION Delayed reperfusion, high thrombus burden on baseline angiography, and blood glucose level on admission can be used to stratify AMI patients into a lower or higher risk for angiographic slow/no-reflow during PCI. In addition, angiographic slow/no-reflow predicts an adverse outcome in AMI patients.
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Affiliation(s)
- Li Dong-bao
- Department of Cardiology, Xuanwu Hospital, Capital Medical University, Beijing, China
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239
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Mahmoudi M, Delhaye C, Wakabayashi K, Torguson R, Xue Z, Suddath WO, Satler LF, Kent KM, Pichard AD, Waksman R. Integrilin in patients undergoing primary percutaneous coronary intervention for ST-elevation myocardial infarction. J Interv Cardiol 2011; 24:351-6. [PMID: 21426398 DOI: 10.1111/j.1540-8183.2011.00632.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND The adjunctive use of eptifibatide in patients undergoing primary percutaneous coronary intervention (PCI) for ST-elevation myocardial infarction (STEMI) remains controversial. We therefore set out to determine the safety and efficacy of eptifibatide in this population. METHODS The study comprised 857 consecutive patients who underwent primary PCI for STEMI at the Washington Hospital Center. Three hundred eighteen patients also received adjunctive therapy with eptifibatide. Patients who had received thrombolysis prior to undergoing cardiac catheterization were excluded. The primary end-point was all-cause mortality and the composite of all-cause mortality or Q-wave MI. The primary safety end-point was the rate of thrombolysis in myocardial infarction (TIMI) major bleeding. RESULTS The eptifibatide group was younger, had a higher body mass index, and a lower proportion of patients with systemic hypertension, diabetes mellitus, previous history of ischemic heart disease, coronary revascularization, and congestive heart failure. This cohort also used bivalirudin less often (23.3% vs. 72%; P < 0.001). Following multivariable analysis, the eptifibatide group had a significantly lower rate of all-cause mortality (hazard ratio 0.55; 95% confidence interval 0.34-0.89; P = 0.01) and the composite of all-cause mortality or Q-wave MI (hazard ratio 0.59; 95% confidence interval 0.37-0.95; P = 0.03) at 6 months. The rate of TIMI major bleeding was similar in both groups (hazard ratio 0.54; 95% confidence interval 0.25-1.17; P = 0.12). CONCLUSION The adjunctive use of eptifibatide in patients presenting with STEMI may be associated with improved clinical outcomes. (J Interven Cardiol 2011;24:351-356).
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Affiliation(s)
- Michael Mahmoudi
- Department of Internal Medicine, Division of Cardiology, Washington Hospital Center, DC, USA
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240
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Chadderdon SM, Kaul S. Myocardial contrast echocardiography in coronary artery disease. J Cardiovasc Echogr 2011. [DOI: 10.1016/j.jcecho.2011.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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241
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Vinten-Johansen J, Granfeldt A, Mykytenko J, Undyala VV, Dong Y, Przyklenk K. The multidimensional physiological responses to postconditioning. Antioxid Redox Signal 2011; 14:791-810. [PMID: 20618066 DOI: 10.1089/ars.2010.3396] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Reperfusion is the definitive treatment to reduce infarct size and other manifestations of postischemic injury. However, reperfusion contributes to postischemic injury, and, therefore, reperfusion therapies do not achieve the optimal salvage of myocardium. Other tissues as well undergo injury after reperfusion, notably, the coronary vascular endothelium. Postconditioning has been shown to have salubrious effects on different tissue types within the heart (cardiomyocytes, endothelium) and to protect against various pathologic processes, including necrosis, apoptosis, contractile dysfunction, arrhythmias, and microvascular injury or "no-reflow." The mechanisms by which postconditioning alters the pathophysiology of reperfusion injury is exceedingly complex and involves physiological mechanisms (e.g., delaying re-alkalinization of tissue pH, triggering release of autacoids, and opening and closing of various channels) and molecular mechanisms (activation of kinases) that affect cellular and subcellular targets or effectors. The physiologic responses to postconditioning are not isolated or mutually exclusive, but are interactive, with one response affecting another in an integrated manner. This integrated response on multiple targets differs from the monotherapy approach by drugs that have failed to reduce reperfusion injury on a consistent basis and may underlie the efficacy of this therapeutic approach across species and in human trials.
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Affiliation(s)
- Jakob Vinten-Johansen
- Department of Surgery (Cardiothoracic), Carlyle Fraser Heart Center, Emory University, 550 Peachtree Street NE, Atlanta, GA 30308-2225, USA.
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242
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Nakashima H, Muto S, Amenomori K, Shiraishi Y, Nunohiro T, Suzuki S. Impact of obstructive sleep apnea on myocardial tissue perfusion in patients with ST-segment elevation myocardial infarction. Circ J 2011; 75:890-6. [PMID: 21301132 DOI: 10.1253/circj.cj-10-0768] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Vascular endothelial dysfunction has been recognized as an essential feature of obstructive sleep apnea (OSA). This study was designed to examine the hypothesis that OSA may impair the coronary microcirculation in patients with ST-segment elevation myocardial infarction (STEMI). METHODS AND RESULTS The present study included 100 patients with a first STEMI who underwent primary percutaneous coronary intervention (PCI) within 12h from onset. Coronary flow velocity at baseline and at maximum hyperemia was measured using a Doppler guidewire following PCI. Total ST-segment elevation was calculated at baseline and 30 min after PCI. All patients underwent polysomnography at 14 days to diagnose OSA. Coronary flow velocity reserve (CFVR) was used for quantitative analysis of myocardial tissue perfusion. Systolic retrograde flow (SRF) and ST-segment resolution (STR) <50% were used as an index of microvascular injury. Forty-eight patients presented with OSA. CFVR was comparable between the 2 groups. The incidence of SRF was higher in OSA patients than in the control patients (6% vs. 31%, P=0.005). Patients with OSA had a higher incidence of STR <50% (31% vs. 60%, P=0.003). Multiple logistic regression showed that OSA was an independent positive predictor of SRF and STR <50% (odds ratio=4.46, P=0.044; odds ratio=3.79, P=0.010). CONCLUSIONS OSA may impair myocardial tissue perfusion following primary PCI.
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Affiliation(s)
- Hiroshi Nakashima
- Department of Cardiology, Nagasaki Citizens Hospital, 6-39 Shinchi-machi, Nagasaki 850-8555, Japan.
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243
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Freixa X, Heras M, Ortiz JT, Argiró S, Guasch E, Doltra A, Jiménez M, Betriu A, Masotti M. Utilidad de la determinación de endotelina-1 en el infarto agudo de miocardio. Rev Esp Cardiol 2011; 64:105-10. [DOI: 10.1016/j.recesp.2010.07.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Accepted: 07/29/2010] [Indexed: 11/15/2022]
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244
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Yuksel UC, Celik T, Celik M, Bugan B, Iyisoy A, Yaman H. High admission levels of γ-glutamyltransferase predict poor myocardial perfusion after primary percutaneous intervention. Clinics (Sao Paulo) 2011; 66:1729-34. [PMID: 22012044 PMCID: PMC3180164 DOI: 10.1590/s1807-59322011001000010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Accepted: 06/23/2011] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVE This retrospective study aimed to investigate the relationship between admission levels of serum y-glutamyltransferase and poor myocardial perfusion after primary percutaneous coronary intervention in patients with acute myocardial infarction. INTRODUCTION Reperfusion injury caused by free radical release and increased oxidative stress is responsible for the pathophysiology of the no-reflow phenomenon in patients with acute myocardial infarction undergoing primary percutaneous coronary intervention. Serum γ-glutamyltransferase is an established marker of increased oxidative stress. METHODS The study population consisted of 80 patients (64 men and 16 women, mean age = 67.5 + 6.6 years) with thrombolysis in myocardial infarction 0/1 flow pre-procedurally. The patients were divided into two groups according to thrombolysis in myocardial perfusion grades that were assessed immediately following primary percutaneous coronary intervention. The two groups (group 1 and group 2) each consisted of 40 patients with thrombolysis in myocardial perfusion grades 0-1 and thrombolysis in myocardial perfusion grades 2-3, respectively. RESULTS Admission pain to balloon time, γ-glutamyltransferase and creatine kinase-MB isoenzyme levels of group 1 patients were significantly higher than those of group 2 patients. Pain to balloon time, γ-glutamyltransferase, peak creatine kinase-MB isoenzyme, low left ventricular ejection fraction and poor pre-procedural thrombolysis in myocardial infarction grade were significantly associated with poor myocardial perfusion by univariate analysis. However, only pain to balloon time and γ-glutamyltransferase levels showed a significant independent association with poor myocardial perfusion by backward logistic regression analysis. Adjusted odds ratios were calculated as 4.92 for pain to balloon time and 1.13 for γ-glutamyltransferase. CONCLUSION High admission γ-glutamyltransferase levels are associated with poor myocardial perfusion in patients with acute myocardial infarction undergoing primary percutaneous coronary intervention, particularly in patients with prolonged pain to balloon time.
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Affiliation(s)
- Uygar Cagdas Yuksel
- Department of Cardiology, School of Medicine, Gulhane Military Medical Academy, Etlik-Ankara, Turkey
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245
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Yilmaz A, Bekpinar S, Unlucerci Y, Gurdol F, Umman B. High concentrations of asymmetric dimethylarginine are associated with ST-segment resolution failure after reperfusion for acute myocardial infarction. Clin Chem Lab Med 2011; 49:903-7. [DOI: 10.1515/cclm.2011.148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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246
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Ito N, Nanto S, Doi Y, Kurozumi Y, Tonomura D, Natsukawa T, Sawano H, Masuda D, Yamashita S, Okada KI, Hayashi Y, Kai T, Hayashi T. Distal Protection During Primary Coronary Intervention Can Preserve the Index of Microcirculatory Resistance in Patients With Acute Anterior ST-Segment Elevation Myocardial Infarction. Circ J 2011; 75:94-8. [DOI: 10.1253/circj.cj-10-0133] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Noritoshi Ito
- Senri Critical Care Medical Center, Critical & Cardiovascular Care Unit, Osaka Saiseikai Senri Hospital
| | - Shinsuke Nanto
- Department of Advanced Cardiovascular Therapeutics, Osaka University Graduate School of Medicine
| | - Yasuji Doi
- Division of Cardiovascular Medicine, Critical & Cardiovascular Care Unit, Osaka Saiseikai Senri Hospital
| | - Yuma Kurozumi
- Senri Critical Care Medical Center, Critical & Cardiovascular Care Unit, Osaka Saiseikai Senri Hospital
| | - Daisuke Tonomura
- Senri Critical Care Medical Center, Critical & Cardiovascular Care Unit, Osaka Saiseikai Senri Hospital
| | - Tomoaki Natsukawa
- Senri Critical Care Medical Center, Critical & Cardiovascular Care Unit, Osaka Saiseikai Senri Hospital
| | - Hirotaka Sawano
- Senri Critical Care Medical Center, Critical & Cardiovascular Care Unit, Osaka Saiseikai Senri Hospital
| | - Daisaku Masuda
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine
| | - Shizuya Yamashita
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine
| | - Ken-ichiro Okada
- Division of Cardiovascular Medicine, Critical & Cardiovascular Care Unit, Osaka Saiseikai Senri Hospital
| | - Yasuyuki Hayashi
- Senri Critical Care Medical Center, Osaka Saiseikai Senri Hospital
| | - Tatsuro Kai
- Senri Critical Care Medical Center, Osaka Saiseikai Senri Hospital
| | - Toru Hayashi
- Division of Cardiovascular Medicine, Critical & Cardiovascular Care Unit, Osaka Saiseikai Senri Hospital
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Gao JY, Yasuda S, Tsuburaya R, Ito Y, Shiroto T, Hao K, Aizawa K, Kikuchi Y, Ito K, Shimokawa H. Long-Term Treatment With Eicosapentaenoic Acid Ameliorates Myocardial Ischemia-Reperfusion Injury in Pigs In Vivo - Involvement of Rho-Kinase Pathway Inhibition -. Circ J 2011; 75:1843-51. [DOI: 10.1253/circj.cj-11-0209] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jun Yi Gao
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
| | - Satoshi Yasuda
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
| | - Ryuji Tsuburaya
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
| | - Yoshitaka Ito
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
| | - Takashi Shiroto
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
| | - Kiyotaka Hao
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
| | - Kentaro Aizawa
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
| | - Yoku Kikuchi
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
| | - Kenta Ito
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
| | - Hiroaki Shimokawa
- Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
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Kosuge M, Ebina T, Hibi K, Iwahashi N, Tsukahara K, Endo M, Maejima N, Hashiba K, Suzuki H, Umemura S, Kimura K. High QRS score on admission strongly predicts impaired myocardial reperfusion in patients with a first anterior acute myocardial infarction. Circ J 2010; 75:626-32. [PMID: 21187653 DOI: 10.1253/circj.cj-10-1053] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND In patients with acute myocardial infarction (AMI), QRS score at presentation electrocardiogram (ECG) may reflect the evolutionary stage of the infarction and allow one to predict the degree of myocardial reperfusion potentially achievable by reperfusion therapy. METHODS AND RESULTS The relationship between QRS score on admission ECG and myocardial blush grade, an angiographic marker of myocardial reperfusion, was examined in 416 patients with a first anterior AMI who received reperfusion therapy within 6h after symptom onset. Patients were classified into 3 groups according to QRS score: 0 or 1 (n=102), 2-4 (n=228), and ≥5 (n=86). Higher QRS scores were associated with a longer time to admission, a greater ST-segment elevation, a higher frequency of impaired initial and final culprit coronary vessel flow, a higher peak creatine kinase level, and a higher frequency of impaired myocardial reperfusion as defined by myocardial blush grade 0/1 on the final angiogram. Multivariate analysis showed that a high QRS score ≥5 was the strongest predictor of impaired myocardial reperfusion (odds ratio 20.3, P<0.001). These findings were similar when the data were stratified according to time to admission (≤2h, >2h). CONCLUSIONS In patients with a first anterior AMI treated by reperfusion therapy, admission high QRS score ≥5 strongly predicts impaired myocardial reperfusion, even when presentation is early (≤2h).
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Affiliation(s)
- Masami Kosuge
- Division of Cardiology, Yokohama City University Medical Center, 4-57 Urafune-cho, Minamiku, Yokohama 232-0024, Japan.
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Relationship between retrograde coronary blood flow and the extent of no-reflow and infarct size in a porcine ischemia-reperfusion model. J Cardiovasc Transl Res 2010; 4:99-105. [PMID: 21153063 DOI: 10.1007/s12265-010-9240-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Accepted: 11/02/2010] [Indexed: 10/18/2022]
Abstract
Recanalization of an infarct-related artery does not predictably reflect tissue reperfusion. We examined the relationship between coronary blood flow (CBF) pattern during reperfusion and infarcted (IA) and no-reflow (NR) area in a porcine ischemia-reperfusion model. The mid-left anterior descending artery of 18 pigs was occluded for 1 h and reperfused for 2 h. CBF during reperfusion was measured with a transit-time ultrasound flowmeter, while systemic arterial and left atrial pressures were monitored. IA and NR were measured with triphenyl tetrazolium chloride and thioflavin staining, respectively. In 13 pigs, early systolic retrograde CBF developed within the first 30 min and persisted throughout reperfusion. No retrograde CBF was observed in five pigs. Mean retrograde CBF at 2 h of reperfusion predicted a larger IA (r = 0.71; p = 0.001). Time-to-development of retrograde CBF was inversely related to IA (r = -0.55; p = 0.019) and NR (r = -0.62; p = 0.006). A larger IA (OR 1.12, 95% CI 1.01-1.24, p = 0.037) and NR (OR 1.09, 95% CI 1.01-1.18, p = 0.037) predicted the presence of retrograde CBF. Retrograde CBF during recanalization of the infarct-related artery predicts IA and NR and might be used as an index of successful reperfusion at the tissue level.
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Kitakaze M. How to mediate cardioprotection in ischemic hearts--accumulated evidence of basic research should translate to clinical medicine. Cardiovasc Drugs Ther 2010; 24:217-23. [PMID: 20645124 DOI: 10.1007/s10557-010-6248-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Ischemic heart failure is one of the leading causes of death in the western countries and it is a critical issue to overcome ischemic heart diseases for the human health care worldwide. There are several aspects of ischemic heart failure that we need to seriously consider for the conquest of cardiovascular death. First of all, we need to know either causes or pathophysiology of the onset of coronary artery disease, the ischemia/reperfusion injury and post-infarction cardiac remodeling. Secondly, we need to find the potential seeds for the molecular, pharmacological, biomedical or engineering treatment to prevent or attenuate ischemic heart diseases. Thirdly, we need to accelerate translational research and to create the network of clinical trials to grow the novel seeds to the fruitful big trees. Finally, we need to justify these strategies to overcome the ischemic heart diseases and to contribute the world welfare systems after we propose the novel therapy for the prevention and attenuation of ischemic heart diseases. The most strong and essential hypotheses to attenuate the cardiovascular injury in ischemic heart disease for last three decades are ischemic preconditioning/postconditioning. Many investigators have involved in the clarification of the characteristics of ischemic preconditioning/postconditioning and their cellular mechanisms, and the clinical applications of their basic results. Here, 8 potential basic and clinical researchers includeing us discuss these issues that they have devotedly studies for many years.
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Affiliation(s)
- Masafumi Kitakaze
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, 1-5-7 Fujishirodai, Suita, 565-8565, Japan.
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