Echocardiographic parameters in reversible idiopathic dilated cardiomyopathy
H Khanlou1, B Paltoo, W Forbes
1Department of Medicine, Albert Einstein Medical Center, Philadelphia, Pennsylvania, USA. khanlou@aol.com
Insights
Reversible idiopathic dilated cardiomyopathy (IDCM) can occur, but initial echocardiographic measurements of left ventricular dimensions and ejection fraction do not predict recovery. Further research is needed to identify predictors of IDCM reversibility.
Area of Science:
- Cardiology
- Internal Medicine
Background:
- Idiopathic dilated cardiomyopathy (IDCM) is a rare condition.
- The potential for left ventricular (LV) dilation to predict prognosis in IDCM is debated.
- This study investigates reversible IDCM and associated echocardiographic findings.
Purpose of the Study:
- To identify cases of reversible IDCM.
- To evaluate echocardiographic parameters in patients with reversible IDCM.
- To determine if baseline echocardiographic findings predict IDCM reversibility.
Main Methods:
- Retrospective analysis of 5 patients with reversible IDCM and 10 control patients with non-reversible IDCM.
- Comparison of baseline and follow-up echocardiographic data, including left atrial and LV dimensions and ejection fraction.
- Statistical analysis to compare parameters between the reversible and non-reversible groups.
Main Results:
- No significant differences were observed in baseline left atrial dimensions between groups (P=0.758).
- No significant differences were found in baseline LV dimensions (diastole P=0.711, systole P=0.712) or ejection fraction (P=0.623) between groups.
- These findings indicate a lack of correlation between initial echocardiographic measurements and IDCM reversibility.
Conclusions:
- Initial echocardiographic parameters, including chamber dimensions and LV ejection fraction, are not reliable predictors of IDCM reversibility.
- Further investigation is required to identify factors that predict the recovery of left ventricular function in IDCM.
Background:
Reversible idiopathic dilated cardiomyopathy (IDCM) is a rare entity. It has been hypothesized that the degree of left ventricular end diastolic dilation is an important independent predictor of prognosis. We undertook a study to identify cases of reversible IDCM and to evaluate the echocardiographic findings in these patients.
Methods:
We identified 5 patients with IDCM who showed normalization of left ventricular function over a follow up period of 5 months. The findings were compared with those of 10 patients with IDCM who did not show improvement of left ventricular function. The mean (+/-SE) left atrial and left ventricular (LV) dimensions and ejection fraction at baseline and follow-up were compared in both groups.
Results:
There were no statistical differences between the mean (+/-SE) left atrium sizes in the cases and control group at baseline [4.52 (+/-0.24) cm v4.6 (+/-0.13) cm; P = 0.758]. Also, no differences were observed between mean (+/-SE) LV dimensions in diastole and systole in both groups at baseline [LV diastole, 6.72 (+/-0.35) cm versus 6.56 (+/-0.22) cm; P = 0.711; LV systole, 5.6 (+/-0.27) cm versus 5.59 (+/-0.29) cm; P = 0.712] as well as in mean (+/-SE) ejection fraction [24% (+/-3.96) versus 21.7% (+/-3.30); P = 0.623].
Conclusion:
Based on initial echocardiographic parameters, chamber dimensions and baseline LV ejection fraction are not predictors of reversibility.
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