کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5984622 | 1178606 | 2014 | 4 صفحه PDF | دانلود رایگان |
Functional mitral regurgitation (MR) is a common complication accompanying left ventricular dysfunction. Increasing resting heart rate (HR) is demonstrated to be associated with increased mortality in heart failure (HF) patients. Thus, lowering HR is recommended by recent HF management guidelines. However, the hemodynamic effect of changing HR on functional MR remains unclear. We present a patient who demonstrated ischemic cardiomyopathy and was admitted to our hospital. Electrocardiogram showed complete left bundle block with QRS interval of 120Â ms and HR of 60 beats/min. Temporal pacing study was performed to confirm the efficacy of cardiac resynchronization therapy. Functional MR was unexpectedly improved by increasing HR with atrial pacing rather than biventricular pacing. Brain natriuretic peptide was reduced from 3642Â pg/ml to 435Â pg/ml after 2 weeks. Our case indicates that in some HF patients with functional MR, a prolonged diastolic interval may lead to deteriorating MR flow.
Journal: Journal of Cardiology Cases - Volume 9, Issue 2, February 2014, Pages 50-53