Delayed ventricular pacing failure and correlations between pacing thresholds, left ventricular ejection fraction, and QTc values in a male with Takotsubo cardiomyopathy.

Background: Transient pacing failure caused by transient increased pacing threshold has been reported in patients with transient left ventricular apical dysfunction (Takotsubo cardiomyopathy [TC]). Normal pacing thresholds usually recover after normalization of systolic dysfunction.

Hypothesis: Pacing failure correlates with clinics of TC.

Catecholaminergic polymorphic ventricular tachycardia associated with sinus node dysfunction and junctional rhythm: Case report and literature review.

We report the case of a 38-year-old woman with history of syncope and polymorphic ventricular tachycardia; tachycardia was inducible at exercise stress test, not at electrophysiologic study. Phases of QT prolongation were found at ambulatory electrocardiogram monitoring. The woman came to our attention for periodic control of implantable loop recorder.

"Ischemic" ST elevation in a woman with left ventricular hypertrophy.

We report the case of a woman who presented with ST elevation and episodes of chest pain, mimicking an acute myocardial infarction. At coronary angiography no sign of coronary stenosis was found and ECG anomalies were related to asymmetric left ventricular hypertrophy and aortic stenosis.