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Goda A, Takeuchi K, Kikuchi H, Inami T, Kohno T, Soejima K, Satoh T. Pulmonary artery pressure-perfusion relation during exercise in patients with chronic thromboembolic pulmonary hypertension using pulmonary arteriography and right-heart catheterization. INTERNATIONAL JOURNAL OF CARDIOLOGY. HEART & VASCULATURE 2023; 48:101252. [PMID: 37663616 PMCID: PMC10474603 DOI: 10.1016/j.ijcha.2023.101252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/19/2023] [Accepted: 07/28/2023] [Indexed: 09/05/2023]
Abstract
Background In pulmonary hypertension (PH), pulmonary artery pressure (PAP) does not increase to pulmonary perfusion (PP) < 50%. During exercise, PAP may be increased even at PP > 50% for the early detection of PP disorders. The relationship between PP estimated by pulmonary angiography (PAG) and PAP was evaluated in patients with chronic thromboembolic PH (CTEPH) treated by balloon pulmonary angioplasty with near-normal PH. Methods Thirty-one patients (age 60 ± 11 years) with CTEPH underwent catheterization at rest and during exercise. Each segmental PP was determined by visualization of its segmental pulmonary artery and graded from 0 to 3 in the PAG. PP was estimated as the percentage PAG (%PAG) score-%summed total of all segmental PP/the full score-54. Results The mean PAP (mPAP) increased from 28 ± 6 mmHg to 46 ± 10 mmHg during exercise. Transpulmonary pressure gradient, the value of mPAP with the pulmonary artery wedge pressure substituted at peak exercise, was negatively correlated with %PAG score (rs = -0.56, p < 0.001) and elevated at > 50% PP. Conclusions The PAP-PP relationship at peak exercise was correlated, shifting from the relationship at rest, and the PAP started to rise with PP > 50%.
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Affiliation(s)
- Ayumi Goda
- Department of Cardiovascular Medicine, Kyorin University, Tokyo, Japan
| | - Kaori Takeuchi
- Department of Cardiovascular Medicine, Kyorin University, Tokyo, Japan
| | - Hanako Kikuchi
- Department of Cardiovascular Medicine, Kyorin University, Tokyo, Japan
| | - Takumi Inami
- Department of Cardiovascular Medicine, Kyorin University, Tokyo, Japan
| | - Takashi Kohno
- Department of Cardiovascular Medicine, Kyorin University, Tokyo, Japan
| | - Kyoko Soejima
- Department of Cardiovascular Medicine, Kyorin University, Tokyo, Japan
| | - Toru Satoh
- Department of Cardiovascular Medicine, Kyorin University, Tokyo, Japan
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2
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Bandini G, Cometi L, Accogli E, Domanico A, Tofani L, Bruni C, Bellando-Randone S, Lepri G, Orlandi M, Guiducci S, El-Aoufy K, Ciuti G, Fabbri A, Matucci-Cerinic M, Moggi-Pignone A. Ultrasound evaluation of bowel vasculopathy in systemic sclerosis. Eur J Intern Med 2022; 100:62-68. [PMID: 35058148 DOI: 10.1016/j.ejim.2022.01.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 01/05/2022] [Accepted: 01/13/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND Gastrointestinal (GI) manifestations are frequent in systemic sclerosis (SSc) with an impact on quality of life and morbidity. Bowel vasculopathy is a key pathogenetic factor responsible for GI involvement. OBJECTIVES To compare abdominal ultrasound (US) and Color Doppler Ultrasonography (CDU) features of splanchnic vessels of SSc patients with healthy controls. METHODS The charts of SSc patients who underwent an abdominal US and CDU study were retrospectively analyzed. For Superior Mesenteric Artery (SMA) and Inferior Mesenteric Artery (IMA) caliber, Peak Systolic Velocity (PSV), Reverse Velocity (RV), End-Diastolic Velocity (EDV), Mean Velocity (mV), Blood-flow, Resistive Index (RI) and Pulsatility Index (PI) were recorded. RESULTS 28 SSc patients and 28 controls were enrolled. In SSc, caliber of SMA was significantly smaller than in controls (5.75 ± 0.62 mm vs. 6.45 ± 0.60 mm, p < 0.0001 - p adj =0.0002). The flow study of SMA and IMA showed a significant reduction of RV (SMA: 7.25 ± 6.37 cm/s vs. 18.52 ± 6.16 cm/s, p < 0.0001 - p adj <0.0001; IMA: 2.69 ± 6.10 cm/s vs. 17.06 ± 5.75 cm/s, p < 0.0001 - p adj <0.0001) and PI (SMA: 3.33 ± 0.75 vs. 4.53 ± 1.03, p < 0.0001 - p adj =0.0002; IMA: 3.54 ± 0.95 vs. 6.08 ± 1.53, p < 0.0001 - p adj <0.0001) in SSc patients than controls. CONCLUSION involvement of splanchnic vessels in SSc may be non-invasively investigated with abdominal US and CDU. Morphological and functional changes of Doppler parameters observed in SMA and IMA clearly demonstrate that these vessels are affected by SSc vasculopathy.
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Affiliation(s)
- Giulia Bandini
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Internal Medicine AOUC, Viale San Luca, Florence 50134, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy.
| | - Laura Cometi
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Rheumatology AOUC, Florence, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Esterita Accogli
- Department of Internal Medicine, Centre of Research and Learning in Ultrasound, Maggiore Hospital, Bologna, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Andrea Domanico
- Department of Internal Medicine, Centre of Research and Learning in Ultrasound, Maggiore Hospital, Bologna, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Lorenzo Tofani
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Rheumatology AOUC, Florence, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Cosimo Bruni
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Rheumatology AOUC, Florence, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Silvia Bellando-Randone
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Rheumatology AOUC, Florence, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Gemma Lepri
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Rheumatology AOUC, Florence, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Martina Orlandi
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Rheumatology AOUC, Florence, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Serena Guiducci
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Rheumatology AOUC, Florence, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Khadija El-Aoufy
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Rheumatology AOUC, Florence, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Gabriele Ciuti
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Internal Medicine AOUC, Viale San Luca, Florence 50134, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Alessia Fabbri
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Internal Medicine AOUC, Viale San Luca, Florence 50134, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Marco Matucci-Cerinic
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Rheumatology AOUC, Florence, Italy; Unit of Immunology, Rheumatology, Allergy and Rare diseases (UnIRAR), IRCCS San Raffaele Hospital, Milan, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
| | - Alberto Moggi-Pignone
- Department of Experimental and Clinical Medicine, University of Florence, and Division of Internal Medicine AOUC, Viale San Luca, Florence 50134, Italy; Institute of Clinical Physiology, National Research Council, Pisa, Italy; Interventional and Structural Cardiology, Heart, Lung and Vessels Department, AOU Careggi, Italy
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Rallidis LS, Papangelopoulou K, Makavos G, Varounis C, Anthi A, Orfanos SE. Low-Dose Dobutamine Stress Echocardiography for the Early Detection of Pulmonary Arterial Hypertension in Selected Patients with Systemic Sclerosis Whose Resting Echocardiography Is Non-Diagnostic for Pulmonary Hypertension. J Clin Med 2021; 10:jcm10173972. [PMID: 34501420 PMCID: PMC8432002 DOI: 10.3390/jcm10173972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/21/2021] [Accepted: 08/25/2021] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Dobutamine stress echocardiography (DSE) has limited application in systemic sclerosis (SSc). We examined DSE usefulness in revealing pulmonary arterial hypertension (PAH) in selected SSc patients whose resting echocardiography for pulmonary hypertension (PH) was non-diagnostic. METHODS Forty SSc patients underwent right heart catheterization (RHC) and, simultaneously, low-dose DSE (incremental doses up to 20 μg/kg/min). Inclusion criteria were: preserved left and right ventricular (RV) function (tricuspid annulus plane systolic excursion [TAPSE] ≥ 16 mm and tissue Doppler imaging-derived systolic velocity of tricuspid annulus [RVS'] > 10 cm/s), normal pulmonary function tests, and baseline maximal tricuspid regurgitation (TR) velocity of 2.7-3.2 m/s. RESULTS Of 36 patients who completed DSE, resting RHC diagnosed PAH in 12 patients (33.3%). At 20 μg/kg/min, patients with PAH had higher TR velocity, higher pulmonary arterial pressure measured by RHC, and lower RV inotropic response compared with patients without PAH. A cut-off value of maximal TR velocity >3.1 m/s had a sensitivity of 80%, a specificity of 84.2%, and an accuracy of 82.4% for the detection of PAH. CONCLUSIONS Low-dose DSE has a satisfactory diagnostic accuracy for the early detection of PAH in highly selected SSc patients whose baseline echocardiographic measurements for PH lie in the gray zone.
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Affiliation(s)
- Loukianos S. Rallidis
- Second Department of Cardiology and Pulmonary Hypertension Clinic, Attikon Hospital, School of Medicine, National & Kapodistrian University of Athens, 16462 Athens, Greece; (K.P.); (G.M.); (C.V.)
- Correspondence: ; Tel.: +30-210-992-9106
| | - Konstantina Papangelopoulou
- Second Department of Cardiology and Pulmonary Hypertension Clinic, Attikon Hospital, School of Medicine, National & Kapodistrian University of Athens, 16462 Athens, Greece; (K.P.); (G.M.); (C.V.)
| | - Georgios Makavos
- Second Department of Cardiology and Pulmonary Hypertension Clinic, Attikon Hospital, School of Medicine, National & Kapodistrian University of Athens, 16462 Athens, Greece; (K.P.); (G.M.); (C.V.)
| | - Christos Varounis
- Second Department of Cardiology and Pulmonary Hypertension Clinic, Attikon Hospital, School of Medicine, National & Kapodistrian University of Athens, 16462 Athens, Greece; (K.P.); (G.M.); (C.V.)
| | - Anastasia Anthi
- Second Department of Critical Care and Pulmonary Hypertension Clinic, Attikon Hospital, School of Medicine, National & Kapodistrian University of Athens, 16462 Athens, Greece;
| | - Stylianos E. Orfanos
- First Department of Critical Care and Pulmonary Hypertension Center, Evangelismos General Hospital, Medical School, National & Kapodistrian University of Athens, 10676 Athens, Greece;
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The Role of Exercise Doppler Echocardiography to Unmask Pulmonary Arterial Hypertension in Selected Patients with Systemic Sclerosis and Equivocal Baseline Echocardiographic Values for Pulmonary Hypertension. Diagnostics (Basel) 2021; 11:diagnostics11071200. [PMID: 34359284 PMCID: PMC8307336 DOI: 10.3390/diagnostics11071200] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 06/23/2021] [Accepted: 06/29/2021] [Indexed: 02/06/2023] Open
Abstract
Recently, a lower mean pulmonary arterial pressure (PAP) cutoff of >20 mmHg for pulmonary hypertension (PH) definition has been proposed. We examined whether exercise Doppler echocardiography (EDE) can unmask PA hypertension (PAH) in systemic sclerosis (SSc) patients whose baseline echocardiography for PH is equivocal. We enrolled 49 patients with SSc who underwent treadmill EDE. Tricuspid regurgitation (TR) velocity was recorded immediately after EDE. Inotropic reserve of right ventricle (RV) was assessed by the change (post-prior to exercise) of tissue Doppler imaging-derived peak systolic velocity (S) of tricuspid annulus. Inclusion criteria comprised preserved left and RV function, and baseline TR velocity between 2.7 and 3.2 m/s. All patients had right-heart catheterization (RHC) within 48 h after EDE. From 46 patients with good quality of post-exercise TR velocity, RHC confirmed PAH in 21 (45.6%). Post-exercise TR velocity >3.4 m/s had a sensitivity of 90.5%, a specificity of 80% and an accuracy of 84.8% in detecting PAH. Inotropic reserve of RV was positively correlated with maximum achieved workload in METs (r = 0.571, p < 0.001). EDE has a good diagnostic accuracy for the identification of PAH in selected SSc patients whose baseline echocardiographic measurements for PH lie in the gray zone, and it is also potentially useful in assessing RV contractile reserve.
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Shaikh F, Anklesaria Z, Shagroni T, Saggar R, Gargani L, Bossone E, Ryan M, Channick R, Saggar R. A review of exercise pulmonary hypertension in systemic sclerosis. JOURNAL OF SCLERODERMA AND RELATED DISORDERS 2019; 4:225-237. [PMID: 35382504 DOI: 10.1177/2397198319851653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 04/06/2019] [Indexed: 11/16/2022]
Abstract
In general, pulmonary vascular disease has important negative prognostic implications, regardless of the associated condition or underlying mechanism. In this regard, systemic sclerosis is of particular interest as it is the most common connective tissue disease associated with pulmonary hypertension, and a well-recognized at-risk population. In the setting of systemic sclerosis and unexplained dyspnea, the concept of using exercise to probe for underlying pulmonary vascular disease has acquired significant interest. In theory, a diagnosis of systemic sclerosis-associated exercise pulmonary hypertension may allow for earlier therapeutic intervention and a favorable alteration in the natural history of the pulmonary vascular disease. In the context of underlying systemic sclerosis, the purpose of this article is to provide a comprehensive review of the evolving definition of exercise pulmonary hypertension, the current role and methodologies for non-invasive and invasive exercise testing, and the importance of the right ventricle.
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Affiliation(s)
- Faisal Shaikh
- University of California-Los Angeles, Los Angeles, CA, USA
| | | | | | - Rajeev Saggar
- Banner University Medical Center Phoenix, Phoenix, AZ, USA
| | - Luna Gargani
- Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | | | - Michael Ryan
- Central Coast Chest Consultants, San Luis Obispo, CA, USA
| | | | - Rajan Saggar
- University of California-Los Angeles, Los Angeles, CA, USA
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6
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Yang S, Wu J, Lei S, Song R, Cai YY, Wu SJ. Abnormal pulmonary artery systolic pressure response after exercise in systemic sclerosis patients: A PRISMA-compliant meta-analysis. Medicine (Baltimore) 2019; 98:e14342. [PMID: 30732161 PMCID: PMC6380788 DOI: 10.1097/md.0000000000014342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Pulmonary artery systolic pressure (PASP) is an important parameter for detecting pulmonary arterial hypertension (PAH). The difference between rest PASP and post-exercise PASP (ΔPASP) may play a role in predicting and screening resting PAH. The aim of this study is to analyze ΔPASP in systemic sclerosis (SSc) patients with PAH or non-PAH and suggest a cutoff value of ΔPASP for detection of PAH. METHODS PubMed, Embase, and Web of Science were searched for relevant publications up to July 7, 2018. Characteristics of control, no PAH, exercise-induced PAH (EIPH) and PAH subgroups in SSc patients were extracted. R 3.5.0 with the "meta" package was used to conduct this meta-analysis. RESULTS Twelve articles involving 1279 patients were included in this study. The subgroups meta-analysis showed pooled mean ΔPASP in different subgroups: control group (8.6 mmHg, 95% CI: 6.9-10.5), no PAH group (12.2 mmHg, 95% CI: 11.2-13.2), EIPH group (26.0 mmHg, 95% CI: 24.2-27.7) and PAH group (36.2 mmHg, 95% CI: 29.7-42.7). CONCLUSION Combining the results of our study with the previous studies, an abnormal increase in PASP after exercise could indicate the development of PAH in SSc patients. In addition, if ΔPASP>29 mmHg, a high suspicion of PAH should be raised.
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Affiliation(s)
- Song Yang
- Department of Radiology, The Second XiangYa hospital, Central South University
- Diagnosis and Treatment Center of Respiratory Disease, Central South University, No. 139 Middle Renmin Road, Changsha, Hunan, PR China
| | - Jing Wu
- Department of Radiology, The Second XiangYa hospital, Central South University
- Diagnosis and Treatment Center of Respiratory Disease, Central South University, No. 139 Middle Renmin Road, Changsha, Hunan, PR China
| | - Si Lei
- Department of Respiratory Medicine, The Second XiangYa hospital, Central South University
- Research Unit of Respiratory Disease, Central South University, No. 139 Middle Renmin Road
- Diagnosis and Treatment Center of Respiratory Disease, Central South University, No. 139 Middle Renmin Road, Changsha, Hunan, PR China
| | - Rong Song
- Department of Respiratory Medicine, The Second XiangYa hospital, Central South University
- Research Unit of Respiratory Disease, Central South University, No. 139 Middle Renmin Road
- Diagnosis and Treatment Center of Respiratory Disease, Central South University, No. 139 Middle Renmin Road, Changsha, Hunan, PR China
| | - Ye-yu Cai
- Department of Radiology, The Second XiangYa hospital, Central South University
- Diagnosis and Treatment Center of Respiratory Disease, Central South University, No. 139 Middle Renmin Road, Changsha, Hunan, PR China
| | - Shang-jie Wu
- Department of Respiratory Medicine, The Second XiangYa hospital, Central South University
- Research Unit of Respiratory Disease, Central South University, No. 139 Middle Renmin Road
- Diagnosis and Treatment Center of Respiratory Disease, Central South University, No. 139 Middle Renmin Road, Changsha, Hunan, PR China
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7
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Gargani L, Voilliot D, D’Alto M, Agoston G, Moreo A, Serra W, Pieri F, Mori F, Wierzbowska-Drabik K, Matucci-Cerinic M, Moggi-Pignone A. Pulmonary Circulation on the Crossroads Between the Left and Right Heart in Systemic Sclerosis. Heart Fail Clin 2018; 14:271-281. [DOI: 10.1016/j.hfc.2018.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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8
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van Riel ACMJ, Systrom DM, Oliveira RKF, Landzberg MJ, Mulder BJM, Bouma BJ, Maron BA, Shah AM, Waxman AB, Opotowsky AR. Hemodynamic and metabolic characteristics associated with development of a right ventricular outflow tract pressure gradient during upright exercise. PLoS One 2017. [PMID: 28636647 PMCID: PMC5479527 DOI: 10.1371/journal.pone.0179053] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Background We recently reported a novel observation that many patients with equal resting supine right ventricular(RV) and pulmonary artery(PA) systolic pressures develop an RV outflow tract(RVOT) pressure gradient during upright exercise. The current work details the characteristics of patients who develop such an RVOT gradient. Methods We studied 294 patients (59.7±15.5 years-old, 49% male) referred for clinical invasive cardiopulmonary exercise testing, who did not have a resting RVOT pressure gradient defined by the simultaneously measured peak-to-peak difference between RV and PA systolic pressures. Results The magnitude of RVOT gradient did not correspond to clinical or hemodynamic findings suggestive of right heart failure; rather, higher gradients were associated with favorable exercise findings. The presence of a high peak RVOT gradient (90th percentile, ≥33mmHg) was associated with male sex (70 vs. 46%, p = 0.01), younger age (43.6±17.7 vs. 61.8±13.9 years, p<0.001), lower peak right atrial pressure (5 [3–7] vs. 8 [4–12]mmHg, p<0.001), higher peak heart rate (159±19 vs. 124±26 beats per minute, p<0.001), and higher peak cardiac index (8.3±2.3 vs. 5.7±1.9 L/min/m2, p<0.001). These associations persisted when treating peak RVOT as a continuous variable and after age and sex adjustment. At peak exercise, patients with a high exercise RVOT gradient had both higher RV systolic pressure (78±11 vs. 66±17 mmHg, p<0.001) and lower PA systolic pressure (34±8 vs. 50±19 mmHg, p<0.001). Conclusions Development of a systolic RV-PA pressure gradient during upright exercise is not associated with an adverse hemodynamic exercise response and may represent a normal physiologic finding in aerobically fit young people.
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Affiliation(s)
- Annelieke C. M. J. van Riel
- Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands
- Netherlands Heart Institute, Utrecht, The Netherlands
| | - David M. Systrom
- Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Rudolf K. F. Oliveira
- Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
- Division of Respiratory Diseases, Department of Medicine, Federal University of São Paulo (UNIFESP), SP, Brazil
| | - Michael J. Landzberg
- Department of Cardiology, Boston Children's Hospital, and Harvard Medical School, Boston, Massachusetts, United States of America
- Cardiovascular Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Barbara J. M. Mulder
- Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands
- Netherlands Heart Institute, Utrecht, The Netherlands
| | - Berto J. Bouma
- Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands
| | - Bradley A. Maron
- Cardiovascular Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
- Veterans Affairs Boston Healthcare System, Boston, Massachusetts, United States of America
| | - Amil M. Shah
- Cardiovascular Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Aaron B. Waxman
- Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Alexander R. Opotowsky
- Department of Cardiology, Boston Children's Hospital, and Harvard Medical School, Boston, Massachusetts, United States of America
- Cardiovascular Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail:
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9
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Baptista R, Serra S, Martins R, Teixeira R, Castro G, Salvador MJ, Pereira da Silva JA, Santos L, Monteiro P, Pêgo M. Exercise echocardiography for the assessment of pulmonary hypertension in systemic sclerosis: a systematic review. Arthritis Res Ther 2016; 18:153. [PMID: 27368695 PMCID: PMC4930605 DOI: 10.1186/s13075-016-1051-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 06/20/2016] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Pulmonary arterial hypertension (PAH) complicates the course of systemic sclerosis (SSc) and is associated with poor prognosis. The elevation of systolic pulmonary arterial pressure (sPAP) during exercise in patients with SSc with normal resting haemodynamics may anticipate the development of PAH. Exercise echocardiography (ExEcho) has been proposed as a useful technique to identify exercise-induced increases in sPAP, but it is unclear how to clinically interpret these findings. In this systematic review, we summarize the available evidence on the role of exercise echocardiography to estimate exercise-induced elevations in pulmonary and left heart filling pressures in patients with systemic sclerosis. METHODS We conducted a systematic review of the literature using MEDLINE, Cochrane Library and Web of Knowledge, using the vocabulary terms: ('systemic sclerosis' OR 'scleroderma') AND ('exercise echocardiography') AND ('pulmonary hypertension'). Studies including patients with SSc without a prior diagnosis of PAH, and subjected to exercise echocardiography were included. All searches were limited to English and were augmented by review of bibliographic references from the included studies. The quality of evidence was assessed by the Effective Public Health Practice Project system. RESULTS We identified 15 studies enrolling 1242 patients, who were mostly middle-aged and female. Several exercise methods were used (cycloergometer, treadmill and Master's two step), with different protocols and positions (supine, semi-supine, upright); definition of a positive test also varied widely. Resting estimated sPAP levels varied from 18 to 35 mm Hg, all in the normal range. The weighted means for estimated sPAP were 22.2 ± 2.9 mmHg at rest and 43.0 ± 4.3 mmHg on exercise; more than half of the studies reported mean exercise sPAP ≥40 mmHg. The assessment of left ventricular diastolic function on peak exercise was reported in a minority of studies; however, when assessed, surrogate variables of left ventricular (LV) diastolic dysfunction were associated with higher sPAP on exercise. CONCLUSIONS We found very high heterogeneity in the methods, the protocols and the estimated sPAP response to exercise. LV diastolic dysfunction was common and was associated with greater elevation of sPAP on exercise.
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Affiliation(s)
- Rui Baptista
- Department of Cardiology, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-001, Coimbra, Portugal. .,Faculty of Medicine, University of Coimbra, Coimbra, Portugal.
| | - Sara Serra
- Department of Rheumatology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Rui Martins
- Department of Cardiology, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-001, Coimbra, Portugal
| | - Rogério Teixeira
- Department of Cardiology, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-001, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Graça Castro
- Department of Cardiology, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-001, Coimbra, Portugal
| | - Maria João Salvador
- Department of Rheumatology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - José António Pereira da Silva
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Department of Rheumatology, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Lèlita Santos
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal.,Department of Internal Medicine, Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - Pedro Monteiro
- Department of Cardiology, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-001, Coimbra, Portugal.,Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Mariano Pêgo
- Department of Cardiology, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-001, Coimbra, Portugal
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The Role of Exercise Testing in the Modern Management of Pulmonary Arterial Hypertension. Diseases 2014. [DOI: 10.3390/diseases2020120] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Anjak A, López-Candales A, Lopez FR, Harris D, Elwing J. Objective Measures of Right Ventricular Function during Exercise: Results of a Pilot Study. Echocardiography 2013; 31:508-15. [DOI: 10.1111/echo.12417] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Affiliation(s)
- Ahmad Anjak
- Department of Medicine; University of Cincinnati College of Medicine; Cincinnati Ohio
| | - Angel López-Candales
- Division of Cardiovascular Medicine; University of Cincinnati College of Medicine; Cincinnati Ohio
| | - Francisco R. Lopez
- Department of Medicine; University of Cincinnati College of Medicine; Cincinnati Ohio
| | - David Harris
- Division of Cardiovascular Medicine; University of Cincinnati College of Medicine; Cincinnati Ohio
| | - Jean Elwing
- Division of Pulmonary; Critical Care & Sleep Medicine; University of Cincinnati College of Medicine; Cincinnati Ohio
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12
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Right heart catheterization measuring central hemodynamics in cystic fibrosis during exercise. Respir Med 2013; 107:1365-9. [DOI: 10.1016/j.rmed.2013.02.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 02/02/2013] [Accepted: 02/11/2013] [Indexed: 11/19/2022]
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13
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Ciurzyński M, Bienias P, Irzyk K, Kostrubiec M, Bartoszewicz Z, Siwicka M, Kurzyna M, Demkow U, Pruszczyk P. Exaggerated increase of exercise-induced pulmonary artery pressure in systemic sclerosis patients predominantly results from left ventricular diastolic dysfunction. Clin Res Cardiol 2013; 102:813-20. [PMID: 23824244 PMCID: PMC3825133 DOI: 10.1007/s00392-013-0594-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 06/21/2013] [Indexed: 11/29/2022]
Abstract
OBJECTIVE High prevalence of exaggerated pulmonary artery pressure response to exercise (EPAPR) was reported in patients with systemic sclerosis (SSc). However, pathophysiology of this phenomenon has not been well defined. Therefore, we evaluated the frequency and potential aetiology of EPAPR in SSc patients. METHODS We included 85 patients (79 female, 6 male, mean age 54.3 ± 13.9 years) with SSc. Transthoracic echocardiography followed by exercise Doppler echocardiography (EDE) were performed. A positive EDE was defined when at least 20 mmHg increase of tricuspid regurgitation peak gradient (TRPG) was recorded. Right heart catheterization (RHC) with exercise was performed in positive EDE patients and in subjects with resting TRPG >31 mmHg. RESULTS Resting TRPG >31 mmHg and/or positive EDE was found in 30 patients and they were referred to RHC. Finally, RHC was performed in 20 patients (16 pts resting TRPG >31 mmHg and 4 others normal resting TRPG and positive EDE). In 12 (60 %) of them an EPAPR with elevated pulmonary capillary wedge pressure (PCWP) was observed. Interestingly, mean left atrium (LA) diameter was greater in an EPAPR with elevated PCWP patients than in subjects with normal exercise response (39.36 ± 5.6 vs. 35.53 ± 3.48, p = 0.03). In EPAPR with elevated PCWP group greater mean value of E/E' of mitral lateral annulus was observed (7.98 ± 3.35 vs. 6.27 ± 1.94, p = 0.03). In the univariate logistic regression analysis increased LA diameter was significant predictor of EPAPR with elevated PCWP (OR 1.199, 95 % CI 1.029-1.396, p = 0.019). CONCLUSIONS Despite very well-known risk of PAH in systemic sclerosis patients, the excessive increase of PAP during exercise is more commonly caused by left ventricular diastolic dysfunction than pulmonary arterial vasculopathy.
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Affiliation(s)
- Michał Ciurzyński
- Department of Internal Medicine and Cardiology, Medical University of Warsaw, Warsaw, Poland,
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14
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Noninvasive assessment of right heart function and hemodynamics during exercise in patients with pulmonary arterial hypertension. South Med J 2013; 106:141-6. [PMID: 23380750 DOI: 10.1097/smj.0b013e3182805165] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Noninvasive assessment of right heart function and hemodynamics in patients with pulmonary arterial hypertension (PAH) is most often performed at rest, whereas the symptoms, in general, present with exertion. Assessment during exertion is limited to symptom assessment and the 6-minute walk distance. We investigated the feasibility of obtaining echocardiographic data that could accurately reflect pulmonary artery pressures (PAP), particularly mean PAP and right ventricular function during exercise in patients with PAH. METHODS We investigated right ventricular function and hemodynamics using echocardiography during symptom-limited exercise in 10 consecutive patients undergoing right heart catheterization (RHC) as part of their clinical evaluation for PAH. We further assessed these measurements for correlation with known predictors of outcome in PAH in an exploratory analysis. RESULTS We were able to successfully obtain complete right heart measurements by echocardiography, including mean PAP, in the majority (9 of 10) of the subjects. One patient had an incomplete tricuspid regurgitation jet at rest and with exercise. Echocardiographic pulmonary vascular resistance correlated with RHC cardiac output and brain natriuretic peptide level, whereas tricuspid annular plane systolic excursion during exercise correlated with right atrial pressure on RHC, brain natriuretic peptide, and 6-minute walk distance. Tricuspid regurgitation velocity and mean PAP with exercise correlated moderately with mean PAP and cardiac output by RHC. CONCLUSIONS Exercise echocardiography can provide meaningful data in patients with PAH, including measuring mean PAP. The presence of correlations in this small number of patients indicates promising targets for future investigation.
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15
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Gargani L, Pignone A, Agoston G, Moreo A, Capati E, Badano LP, Doveri M, Bazzichi L, Costantino MF, Pavellini A, Pieri F, Musca F, Muraru D, Epis O, Bruschi E, De Chiara B, Perfetto F, Mori F, Parodi O, Sicari R, Bombardieri S, Varga A, Cerinic MM, Bossone E, Picano E. Clinical and echocardiographic correlations of exercise-induced pulmonary hypertension in systemic sclerosis: a multicenter study. Am Heart J 2013; 165:200-7. [PMID: 23351823 DOI: 10.1016/j.ahj.2012.10.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Accepted: 10/04/2012] [Indexed: 10/27/2022]
Abstract
BACKGROUND Patients with systemic sclerosis (SSc) are at risk for developing pulmonary hypertension, which is associated with a poor prognosis. Exercise Doppler echocardiography enables the identification of exercise-induced increase in pulmonary artery systolic pressure (PASP) and may provide a thorough noninvasive hemodynamic evaluation. AIM The aim of this study was to evaluate the clinical and echocardiographic determinants of exercise-induced increase in PASP in a large population of patients with SSc. METHODS We selected 164 patients with SSc (age 58 ± 13 years, 91% female) with normal resting PASP (<40 mm Hg) who underwent a comprehensive 2-dimensional and Doppler echocardiography and graded bicycle semisupine exercise Doppler echocardiography. Pulmonary artery systolic pressure, cardiac output, and pulmonary vascular resistance (PVR) were estimated noninvasively. Cutoff values of PASP ≥50 mm Hg and PVR ≥3.0 Wood Units at peak exercise were considered a significant exercise-induced increase in PASP and PVR, respectively. RESULTS Sixty-nine (42%) patients showed a significant exercise-induced increase in PASP. Among them, peak PVR ≥3 Wood Units was present only in 11% of patients, about 5% of the total population. Univariate analysis showed that age, presence of interstitial lung disease, and both right and left diastolic dysfunction are predictors of peak PASP ≥50 mm Hg, but none of these parameters predict elevated peak PVR. CONCLUSIONS Exercise-induced increase in PASP occurs in almost one-half of patients with SSc with normal resting PASP. Peak exercise PASP is affected by age, interstitial lung disease, and right and left ventricular diastolic dysfunction and, only in 5% of the patients, is associated with an increase in PVR during exercise, suggesting heterogeneity of the mechanisms underlying exercise-induced pulmonary hypertension in SSc.
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16
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Baptista R, Serra S, Martins R, Salvador MJ, Castro G, Gomes M, Santos L, Monteiro P, da Silva JAP, Pêgo M. Exercise-Induced Pulmonary Hypertension in Scleroderma Patients: A Common Finding but with Elusive Pathophysiology. Echocardiography 2012; 30:378-84. [DOI: 10.1111/echo.12063] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
| | - Sara Serra
- Department of Rheumatology; Coimbra University Hospital; Coimbra; Portugal
| | - Rui Martins
- Department of Cardiology; Coimbra University Hospital; Coimbra; Portugal
| | | | - Graça Castro
- Department of Cardiology; Coimbra University Hospital; Coimbra; Portugal
| | - Manuel Gomes
- Department of Internal Medicine; Coimbra University Hospital; Coimbra; Portugal
| | | | | | | | - Mariano Pêgo
- Department of Cardiology; Coimbra University Hospital; Coimbra; Portugal
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Grünig E, Barner A, Bell M, Claussen M, Dandel M, Dumitrescu D, Gorenflo M, Holt S, Kovacs G, Ley S, Meyer JF, Pabst S, Riemekasten G, Saur J, Schwaiblmair M, Seck C, Sinn L, Sorichter S, Winkler J, Leuchte HH. Non-invasive diagnosis of pulmonary hypertension: ESC/ERS Guidelines with Updated Commentary of the Cologne Consensus Conference 2011. Int J Cardiol 2011; 154 Suppl 1:S3-12. [DOI: 10.1016/s0167-5273(11)70488-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Kovacs G, Maier R, Aberer E, Brodmann M, Scheidl S, Hesse C, Troester N, Salmhofer W, Stauber R, Fuerst FC, Thonhofer R, Ofner-Kopeinig P, Gruenig E, Olschewski H. Assessment of Pulmonary Arterial Pressure During Exercise in Collagen Vascular Disease. Chest 2010; 138:270-8. [DOI: 10.1378/chest.09-2099] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Funauchi M, Kishimoto K, Kinoshita K. [Early diagnosis of connective tissue disease-related pulmonary hypertension]. NIHON RINSHO MEN'EKI GAKKAI KAISHI = JAPANESE JOURNAL OF CLINICAL IMMUNOLOGY 2009; 32:457-465. [PMID: 20046012 DOI: 10.2177/jsci.32.457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
It is known that prognosis of pulmonary hypertension (PH), especially connective tissue disease related PH (CTD-PH), is serious. CTD-PH is caused by not only pulmonary arterial hypertension, but also interstitial pneumonitis, hypoxia, chronic thromboembolism of pulmonary artery, or left heart diseases. Recently, prognosis of PH is improved by progress of diagnostic measures including echocardiography and development of effective vasodilators. However, early diagnosis of PH is necessary for further improvement of the prognosis. Previous reports have shown that diffusion lung capacity for carbon monoxide (DLco) is reduced in the early phase of PH, and we have shown that serum lactate dehydrogenase level is also elevated in this phase. Furthermore, we have been studying significance of stress echocardiography. Therefore, if reduced DLco or LDH elevation are recognized, follow up of laboratory data such as blood levels of KL-6, NT-proBNP, D-dimer, echocardiography, high resolution CT of the lung, in addition to clinical findings are important for prediction of PH.
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Affiliation(s)
- Masanori Funauchi
- Department of Nephrology and Rheumatology, Kinki University School of Medicine
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20
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Noninvasive detection of early pulmonary vascular dysfunction in scleroderma. Respir Med 2009; 103:1713-8. [DOI: 10.1016/j.rmed.2009.05.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2009] [Revised: 04/15/2009] [Accepted: 05/04/2009] [Indexed: 11/21/2022]
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21
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Kovacs G, Maier R, Aberer E, Brodmann M, Scheidl S, Tröster N, Hesse C, Salmhofer W, Graninger W, Gruenig E, Rubin LJ, Olschewski H. Borderline Pulmonary Arterial Pressure Is Associated with Decreased Exercise Capacity in Scleroderma. Am J Respir Crit Care Med 2009; 180:881-6. [DOI: 10.1164/rccm.200904-0563oc] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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22
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Systemic sclerosis and cardiac dysfunction: evolving concepts and diagnostic methodologies. Curr Opin Rheumatol 2009; 20:697-702. [PMID: 18946331 DOI: 10.1097/bor.0b013e328313bcf1] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW Primary myocardial involvement is common in systemic sclerosis. There is strong evidence that this involvement is related to repeat focal ischemic injury causing irreversible myocardial fibrosis. Clinically evident cardiac involvement is recognized to be a poor prognostic factor; thus preclinical identification is highly encouraged. RECENT FINDINGS The severity of heart involvement has been confirmed and patients having systemic sclerosis with antitopoisomerase I antibodies seem to be at higher risk. Echocardiography, coupled, if possible, to pulsed tissue Doppler, is the cornerstone of heart assessment. Myocardial perfusion may be assessed by single photon emission computed tomography. When available, cardiac magnetic resonance imaging should be considered as it allows simultaneous measurement of volumes and ventricular function, myocardial perfusion, and assessment of possible inflammation and/or fibrosis. SUMMARY As a result of recent innovations, clinicians have a large panel of methods - some of these possibly reserved for research--whereas the others seem to be widely available and suitable for routine clinical practice. Indeed, conventional echocardiography, pulsed tissue Doppler, and natriuretic peptides may be used for routine assessment.
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Tolle JJ, Waxman AB, Van Horn TL, Pappagianopoulos PP, Systrom DM. Exercise-induced pulmonary arterial hypertension. Circulation 2008; 118:2183-9. [PMID: 18981305 DOI: 10.1161/circulationaha.108.787101] [Citation(s) in RCA: 235] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The clinical relevance of exercise-induced pulmonary arterial hypertension (PAH) is uncertain, and its existence has never been well studied by direct measurements of central hemodynamics. Using invasive cardiopulmonary exercise testing, we hypothesized that exercise-induced PAH represents a symptomatic stage of PAH, physiologically intermediate between resting pulmonary arterial hypertension and normal. METHODS AND RESULTS A total of 406 consecutive clinically indicated cardiopulmonary exercise tests with radial and pulmonary arterial catheters and radionuclide ventriculographic scanning were analyzed. The invasive hemodynamic phenotype of exercise-induced PAH (n=78) was compared with resting PAH (n=15) and normals (n=16). Log-log plots of mean pulmonary artery pressure versus oxygen uptake (V(.)o(2)) were obtained, and a "join-point" for a least residual sum of squares for 2 straight-line segments (slopes m1, m2) was determined; m2<m1="plateau," and m2>m1="takeoff" pattern. At maximum exercise, V(.)o(2) (55.8+/-20.3% versus 66.5+/-16.3% versus 91.7+/-13.7% predicted) was lowest in resting PAH, intermediate in exercise-induced PAH, and highest in normals, whereas mean pulmonary artery pressure (48.4+/-11.1 versus 36.6+/-5.7 versus 27.4+3.7 mm Hg) and pulmonary vascular resistance (294+/-158 versus 161+/-60 versus 62+/-20 dyne x s x cm(-5), respectively; P<0.05) followed an opposite pattern. An exercise-induced PAH plateau (n=32) was associated with lower o(2)max (60.6+/-15.1% versus 72.0+/-16.1% predicted) and maximum cardiac output (78.2+/-17.1% versus 87.8+/-18.3% predicted) and a higher resting pulmonary vascular resistance (247+/-101 versus 199+/-56 dyne x s x cm(-5); P<0.05) than takeoff (n=40). The plateau pattern was most common in resting PAH, and the takeoff pattern was present in nearly all normals. CONCLUSIONS Exercise-induced PAH is an early, mild, and clinically relevant phase of the PAH spectrum.
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Affiliation(s)
- James J Tolle
- Pulmonary and Critical Care Unit, BUL 1-148, Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114, USA.
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