Sudden cardiac arrest as a presenting symptom of mitral valve prolapse.

Mitral valve prolapse (MVP) is a common and predominantly benign condition; however, occasional reports of cardiac arrest in individuals with MVP have raised concern for a malignant subtype. The risk of sudden cardiac arrest in MVP is twice as high as that in the general population. The exact aetiology and risk predictors are elusive, but identification is necessary, if we are to protect patients at risk for cardiac arrest.

Electrophysiological effects and clinical utility of propafenone in children.

Aim: This retrospective case series study sought to describe the safety and clinical effectiveness of propafenone for the control of arrhythmias in children with and without CHD or cardiomyopathy.

Methods: We reviewed baseline characteristics and subsequent outcomes in a group of 63 children treated with propafenone at 2 sites over a 15-year period Therapy was considered effective if no clinically apparent breakthrough episodes of arrhythmias were noted on the medication.

Results: Sixty-three patients (29 males) were initiated on propafenone at a median age of 2.

Epicardial Ablation of Persistent Junctional Reciprocating Tachycardia in an Infant With Tachycardia-Induced Cardiomyopathy.

A 3-month-old infant who developed persistent junctional reciprocating tachycardia (PJRT)-induced cardiomyopathy that was successfully treated with radiofrequency ablation. To our knowledge this is the youngest reported patient with a successful epicardial lesion placed in a diverticulum off the coronary sinus and also the first report of a PJRT connection located at an epicardial site distinct from the mitral and tricuspid valve annulus. We use this case to highlight how low-power lesions in the coronary sinus in the youngest of patients can achieve results safely.

Case of WPW and anomalous right coronary in a teenager with cardiac symptoms.

A 17-year-old African-American man was being followed for palpitations and chest pain. CT angiography revealed an anomalous right coronary artery from the left coronary sinus and he underwent unroofing of the right coronary ostium. There was a manifest pre-excitation on postoperative ECGs, and review of prior ECGs at initial presentation showed subtle pre-excitation suggesting a left lateral pathway.