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Echocardiographic evaluation of left ventricular function before and after cardioversion of atrial fibrillation to
Insights
Cardioversion to normal sinus rhythm did not significantly alter heart size or function in the short term. Echocardiographic measurements did not predict long-term rhythm maintenance after the procedure.
Area of Science:
- Cardiology
- Cardiac Electrophysiology
Background:
- Cardioversion is a common procedure to restore normal sinus rhythm in patients with arrhythmias.
- Understanding the immediate and long-term effects of cardioversion on cardiac structure and function is crucial for patient management.
Purpose of the Study:
- To evaluate immediate changes in echocardiographic parameters following cardioversion.
- To determine if early echocardiographic measurements predict long-term success in maintaining normal sinus rhythm.
Main Methods:
- Echocardiographic measurements including heart rate, left atrial diameter (LAD), left ventricular end-diastolic diameter (LVEDD), and left ventricular end-systolic diameter (LVESD) were recorded in 20 patients.
- Measurements were taken before, immediately after, and at 2, 4, and 6 hours post-cardioversion.
- Long-term follow-up (1-9 months) assessed the persistence of normal sinus rhythm.
Main Results:
- No significant changes in heart rate, LAD, LVEDD, or LVESD were observed at 6 hours post-cardioversion.
- 70% of patients maintained normal sinus rhythm at long-term follow-up.
- Neither LAD, LVEDD, LVESD, nor mitral valve A-wave characteristics correlated with rhythm maintenance.
Conclusions:
- Cardioversion to normal sinus rhythm does not cause significant acute alterations in cardiac dimensions or function.
- Standard echocardiographic parameters measured shortly after cardioversion are not predictive of long-term rhythm stability.
Abstract:
Echocardiographic measurements were obtained in 20 patients before cardioversion immediately after and two, four and six hours after cardioversion to normal sinus rhythm. At six hours after cardioversion there was no significant change in heart rate, left atrial diameters (LAD), left ventricular end-diastolic diameters (LVEDD) or left ventricular end-systolic diameters (LVESD). On follow-up one month to nine months after cardioversion, 14 of the 20 patients (70%) remained in normal sinus rhythm. Neither LAD, LVEDD, or LVESD, nor the presence or amplitude of the A-wave on the mitral valve echogram correlated with the persistence or normal sinus rhythm.