A report describes a case of a 5-year-old boy who presented with palpitation and dyspnea. His symptoms were reported to start after an upper respiratory infection 3 months before admission. He received antibiotics, but his symptoms continued and progressed.
On initial physical examination, he was not found to be cyanotic but seemed fairly pale. Tachycardia (heart rate = 170) and respiratory distress were also noted.
He did not show remarkable response to conventional treatment (digoxin, captopril, and L-carnitine) for DCMP. Tachycardia was guided as congestive heart failure. Thus, carvedilol was added to the previous treatment for 1 month, but it was ineffective. For more evaluation of tachycardia, Holter monitoring was performed, which showed atrial tachycardia with a mean heart rate of 189 beats/min. he was then treated with flecainide for 3 months, following which his signs and symptoms improved and ejection fraction increased (LVEF = 57%). Also, no side effects were reported.
Source: Ahmadi A, Zolfi-Gol A, Arasteh M. Tachycardia-induced cardiomyopathy. ARYA Atheroscler. 2014 May;10(3):175-8. PMID: 25161690; PMCID: PMC4144378.
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