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Cardiac Contributions to Exercise Training Responses in Patients with Chronic Heart Failure: A Strain Imaging Study
The improvement of exercise capacity due to exercise training in heart failure has been associated with peripheral adaptation, but the contribution of cardiac responses is less clear. We sought the extent to which the improvement of functional capacity in patients undergoing exercise training for he...
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Published in: | Echocardiography (Mount Kisco, N.Y.) N.Y.), 2006-05, Vol.23 (5), p.376-382 |
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description | The improvement of exercise capacity due to exercise training in heart failure has been associated with peripheral adaptation, but the contribution of cardiac responses is less clear. We sought the extent to which the improvement of functional capacity in patients undergoing exercise training for heart failure was related to myocardial performance. Thirty‐seven patients (35 men, age 64 ± 11) with symptomatic heart failure and left ventricular ejection fraction ≤35% (29 ± 9%) were studied during a 16‐week exercise training program. LV function was assessed by resting and exercise 2D‐echocardiography, tissue Doppler derived myocardial strain, and strain rate. Peak oxygen consumption (VO2) and LV function were measured at baseline and follow‐up, and the contribution of LV function at baseline and its response to training to the change of each parameter was sought. Baseline peak VO2 (12.4 ± 4.6) increased by 9% at 8 weeks (13.5 ± 4.2, P = 0.26), and by 21% at 16 weeks (15.0 ± 4.9, P < 0.001). Although there were no overall changes in myocardial parameters in this study, change in peak VO2 at 16 weeks was significantly correlated with baseline strain (r = 0.51, P = 0.003) and the improvement of strain at 8 weeks (r = 0.44, P = 0.01), independent of baseline functional capacity and clinical variables. Thus, change in peak VO2 following 16 weeks exercise training is related to myocardial function at baseline. |
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We sought the extent to which the improvement of functional capacity in patients undergoing exercise training for heart failure was related to myocardial performance. Thirty‐seven patients (35 men, age 64 ± 11) with symptomatic heart failure and left ventricular ejection fraction ≤35% (29 ± 9%) were studied during a 16‐week exercise training program. LV function was assessed by resting and exercise 2D‐echocardiography, tissue Doppler derived myocardial strain, and strain rate. Peak oxygen consumption (VO2) and LV function were measured at baseline and follow‐up, and the contribution of LV function at baseline and its response to training to the change of each parameter was sought. Baseline peak VO2 (12.4 ± 4.6) increased by 9% at 8 weeks (13.5 ± 4.2, P = 0.26), and by 21% at 16 weeks (15.0 ± 4.9, P < 0.001). Although there were no overall changes in myocardial parameters in this study, change in peak VO2 at 16 weeks was significantly correlated with baseline strain (r = 0.51, P = 0.003) and the improvement of strain at 8 weeks (r = 0.44, P = 0.01), independent of baseline functional capacity and clinical variables. 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We sought the extent to which the improvement of functional capacity in patients undergoing exercise training for heart failure was related to myocardial performance. Thirty‐seven patients (35 men, age 64 ± 11) with symptomatic heart failure and left ventricular ejection fraction ≤35% (29 ± 9%) were studied during a 16‐week exercise training program. LV function was assessed by resting and exercise 2D‐echocardiography, tissue Doppler derived myocardial strain, and strain rate. Peak oxygen consumption (VO2) and LV function were measured at baseline and follow‐up, and the contribution of LV function at baseline and its response to training to the change of each parameter was sought. Baseline peak VO2 (12.4 ± 4.6) increased by 9% at 8 weeks (13.5 ± 4.2, P = 0.26), and by 21% at 16 weeks (15.0 ± 4.9, P < 0.001). Although there were no overall changes in myocardial parameters in this study, change in peak VO2 at 16 weeks was significantly correlated with baseline strain (r = 0.51, P = 0.003) and the improvement of strain at 8 weeks (r = 0.44, P = 0.01), independent of baseline functional capacity and clinical variables. Thus, change in peak VO2 following 16 weeks exercise training is related to myocardial function at baseline.</description><subject>Aged</subject><subject>Blood Flow Velocity</subject><subject>Cardiomyopathies - diagnostic imaging</subject><subject>Cardiomyopathies - physiopathology</subject><subject>Chronic Disease</subject><subject>echocardiography</subject><subject>Echocardiography, Doppler</subject><subject>Exercise Therapy</subject><subject>Exercise Tolerance</subject><subject>exercise training</subject><subject>Female</subject><subject>Follow-Up Studies</subject><subject>heart failure</subject><subject>Heart Failure - diagnostic imaging</subject><subject>Heart Failure - physiopathology</subject><subject>Heart Rate</subject><subject>Humans</subject><subject>Male</subject><subject>Middle Aged</subject><subject>Myocardial Contraction</subject><subject>Myocardial Ischemia - diagnostic imaging</subject><subject>Myocardial Ischemia - physiopathology</subject><subject>Oxygen Consumption</subject><subject>Patient Compliance</subject><subject>Quality of Life</subject><subject>strain rate imaging</subject><subject>Stroke Volume</subject><subject>Time Factors</subject><subject>Treatment Outcome</subject><subject>ventricular function</subject><subject>Ventricular Function, Left</subject><issn>0742-2822</issn><issn>1540-8175</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNqNkV1v0zAUhi0EYmXwF5CvuEvwVxwHiYsp6tZp1YbY-LizXOd4c0mTYjta--9J1mpcgm9s67zPa1kPQpiSnI7r4zqnhSCZomWRM0JkTghjIt-9QLPnwUs0I6VgGVOMnaA3Ma4JISWl4jU6oVIqKWk1Q7E2ofHG4rrvUvCrIfm-izj1eL6DYH0EfBeM73x3j79C3I5DiNh3-ItJHroU8aNPD7h-CH3nLV6ACQmfG98OAT7hM3ybJhpfbsz9VHGbhmb_Fr1ypo3w7rifom_n87t6kS1vLi7rs2VmBZcio6bgTjDKWVk0tFg560xTEKuYBQ6NMapyFS2AN440UBglXaWsqxy342Ul-Cn6cOjdhv73ADHpjY8W2tZ00A9Ry7IqSkbKfwZpJYQqy6lRHYI29DEGcHob_MaEvaZET2b0Wk8C9CRAT2b0kxm9G9H3xzeG1Qaav-BRxRj4fAg8-hb2_12s5_XiZjyNfHbgfUywe-ZN-DV-lI_Uj-sL_fPqu1zw6lov-R83Iq0x</recordid><startdate>200605</startdate><enddate>200605</enddate><creator>Smart, Neil</creator><creator>Haluska, Brian</creator><creator>Jeffriess, Leanne</creator><creator>Case, Colin</creator><creator>Marwick, Thomas H.</creator><general>Blackwell Publishing Inc</general><scope>BSCLL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TS</scope><scope>7X8</scope></search><sort><creationdate>200605</creationdate><title>Cardiac Contributions to Exercise Training Responses in Patients with Chronic Heart Failure: A Strain Imaging Study</title><author>Smart, Neil ; Haluska, Brian ; Jeffriess, Leanne ; Case, Colin ; Marwick, Thomas H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4364-1a53f4213275d15bfcfad50c82ce3edaa89f915e3df0de5a86f98cf9f3c5a8b43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Aged</topic><topic>Blood Flow Velocity</topic><topic>Cardiomyopathies - diagnostic imaging</topic><topic>Cardiomyopathies - physiopathology</topic><topic>Chronic Disease</topic><topic>echocardiography</topic><topic>Echocardiography, Doppler</topic><topic>Exercise Therapy</topic><topic>Exercise Tolerance</topic><topic>exercise training</topic><topic>Female</topic><topic>Follow-Up Studies</topic><topic>heart failure</topic><topic>Heart Failure - diagnostic imaging</topic><topic>Heart Failure - physiopathology</topic><topic>Heart Rate</topic><topic>Humans</topic><topic>Male</topic><topic>Middle Aged</topic><topic>Myocardial Contraction</topic><topic>Myocardial Ischemia - diagnostic imaging</topic><topic>Myocardial Ischemia - physiopathology</topic><topic>Oxygen Consumption</topic><topic>Patient Compliance</topic><topic>Quality of Life</topic><topic>strain rate imaging</topic><topic>Stroke Volume</topic><topic>Time Factors</topic><topic>Treatment Outcome</topic><topic>ventricular function</topic><topic>Ventricular Function, Left</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Smart, Neil</creatorcontrib><creatorcontrib>Haluska, Brian</creatorcontrib><creatorcontrib>Jeffriess, Leanne</creatorcontrib><creatorcontrib>Case, Colin</creatorcontrib><creatorcontrib>Marwick, Thomas H.</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Physical Education Index</collection><collection>MEDLINE - Academic</collection><jtitle>Echocardiography (Mount Kisco, N.Y.)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Smart, Neil</au><au>Haluska, Brian</au><au>Jeffriess, Leanne</au><au>Case, Colin</au><au>Marwick, Thomas H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Cardiac Contributions to Exercise Training Responses in Patients with Chronic Heart Failure: A Strain Imaging Study</atitle><jtitle>Echocardiography (Mount Kisco, N.Y.)</jtitle><addtitle>Echocardiography</addtitle><date>2006-05</date><risdate>2006</risdate><volume>23</volume><issue>5</issue><spage>376</spage><epage>382</epage><pages>376-382</pages><issn>0742-2822</issn><eissn>1540-8175</eissn><abstract>The improvement of exercise capacity due to exercise training in heart failure has been associated with peripheral adaptation, but the contribution of cardiac responses is less clear. We sought the extent to which the improvement of functional capacity in patients undergoing exercise training for heart failure was related to myocardial performance. Thirty‐seven patients (35 men, age 64 ± 11) with symptomatic heart failure and left ventricular ejection fraction ≤35% (29 ± 9%) were studied during a 16‐week exercise training program. LV function was assessed by resting and exercise 2D‐echocardiography, tissue Doppler derived myocardial strain, and strain rate. Peak oxygen consumption (VO2) and LV function were measured at baseline and follow‐up, and the contribution of LV function at baseline and its response to training to the change of each parameter was sought. Baseline peak VO2 (12.4 ± 4.6) increased by 9% at 8 weeks (13.5 ± 4.2, P = 0.26), and by 21% at 16 weeks (15.0 ± 4.9, P < 0.001). Although there were no overall changes in myocardial parameters in this study, change in peak VO2 at 16 weeks was significantly correlated with baseline strain (r = 0.51, P = 0.003) and the improvement of strain at 8 weeks (r = 0.44, P = 0.01), independent of baseline functional capacity and clinical variables. Thus, change in peak VO2 following 16 weeks exercise training is related to myocardial function at baseline.</abstract><cop>Malden, USA</cop><pub>Blackwell Publishing Inc</pub><pmid>16686619</pmid><doi>10.1111/j.1540-8175.2006.00224.x</doi><tpages>7</tpages></addata></record> |
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subjects | Aged Blood Flow Velocity Cardiomyopathies - diagnostic imaging Cardiomyopathies - physiopathology Chronic Disease echocardiography Echocardiography, Doppler Exercise Therapy Exercise Tolerance exercise training Female Follow-Up Studies heart failure Heart Failure - diagnostic imaging Heart Failure - physiopathology Heart Rate Humans Male Middle Aged Myocardial Contraction Myocardial Ischemia - diagnostic imaging Myocardial Ischemia - physiopathology Oxygen Consumption Patient Compliance Quality of Life strain rate imaging Stroke Volume Time Factors Treatment Outcome ventricular function Ventricular Function, Left |
title | Cardiac Contributions to Exercise Training Responses in Patients with Chronic Heart Failure: A Strain Imaging Study |
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