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Right ventricular functional recovery after acute myocardial infarction: relation with left ventricular function and
B A Popescu1, F Antonini-Canterin, P L Temporelli
1Ospedale Civile, A R C, Pordenone, Italy. abpope07@cmb.ro
Heart (British Cardiac Society)
|March 18, 2005
Summary
Right ventricular (RV) function significantly recovers within six months post-acute myocardial infarction (AMI), showing improvement by discharge. This recovery in RV function is linked to left ventricular (LV) function and interventricular septal (IVS) motion improvements.
Area of Science:
- Cardiology
- Echocardiography
- Myocardial Infarction Research
Background:
- Right ventricular (RV) dysfunction is common after acute myocardial infarction (AMI).
- Understanding RV functional recovery patterns is crucial for managing low-risk AMI patients.
- The interplay between RV function, left ventricular (LV) function, and interventricular septal (IVS) motion requires further elucidation.
Purpose of the Study:
- To assess the recovery trajectory of RV function in low-risk AMI patients.
- To investigate the relationship between RV functional recovery, LV function, and IVS motion.
- To identify predictors of RV functional improvement following AMI.
Main Methods:
- A multicentre clinical trial involving 500 patients from the GISSI-3 echo substudy.
- Serial echocardiograms were performed at 24-48 hours, discharge, six weeks, and six months post-AMI.
- Tricuspid annular plane systolic excursion (TAPSE) and LV ejection fraction (LVEF) were key functional parameters assessed.
Main Results:
- Tricuspid annular plane systolic excursion (TAPSE) showed significant recovery throughout the six-month follow-up, with significant improvement noted by discharge.
- LV ejection fraction (LVEF) at 24-48 hours was the strongest correlate of early TAPSE.
- RV functional recovery was more pronounced in patients with lower initial LVEF, and improvement in interventricular septal (IVS) wall motion score index was the sole independent predictor of TAPSE changes.
Conclusions:
- Right ventricular (RV) function demonstrates significant recovery in low-risk AMI patients, evident as early as hospital discharge and continuing up to six months.
- Early RV function (TAPSE) is closely related to LV function (LVEF).
- The improvement in RV function is strongly associated with enhanced interventricular septal (IVS) motion, highlighting its critical role in RV functional recovery post-AMI.