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January 1, 2001Japanese Circulation JournalOpen Access

Relationship Between Doppler-Derived Left Ventricular Diastolic Function and Exercise Capacity in Patients With Myocardial Infarction

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Why the study?

Do Doppler echocardiographic indices of left ventricular diastolic function correlate with exercise capacity in patients with mild cardiac dysfunction after myocardial infarction?

Population

44 patients with myocardial infarction 6 to 12 months prior, mean age 60.1, 31 men. Key inclusion: stable on…

Design

Cross-sectional

Authors

YSYoko SakateMYMinoru YoshiyamaKHKazuto Hirata

Discussion

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Overview

Diastolic indices associate with exercise capacity post-MI unlike LVEF; hypothesis-generating and requires prospective validation before any clinical use.

Structured PICO

Do Doppler echocardiographic indices of left ventricular diastolic function correlate with exercise capacity in patients with mild cardiac dysfunction after myocardial infarction?

P
Population
44 patients with myocardial infarction (NYHA functional class I or II) 6 to 12 months prior, mean age 60.1, 31 men (70.5%). Key inclusion: stable on medication, no multivessel coronary artery disease, no overt heart failure, sinus rhythm, and showing an 'abnormal relaxation pattern' on Doppler echocardiography.
I
Intervention
Doppler echocardiographic assessment of left ventricular diastolic function
O
Outcome
Correlation between Doppler echocardiographic indices of LV diastolic function and exercise capacity (peak VO2 and anaerobic threshold) measured by cardiopulmonary exercise testingsurrogate

Doppler echocardiographic indices of left ventricular diastolic function, but not systolic function, significantly correlate with exercise capacity in patients with mild cardiac dysfunction after myocardial infarction.

Limitations

  • Only evaluated patients with mild diastolic dysfunction ('abnormal relaxation' pattern)
  • Peripheral muscular function was not evaluated
  • Doppler indices are affected by physiological factors other than diastolic function

Cite This Study

Sakate et al. (2001) studied this question.

synapsesocial.com/papers/6a1cd9186552df3dce1daf99https://doi.org/10.1253/jcj.65.627
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