Limitation of standard ECG criteria to localize an outflow tract PVC.

Multiple ECG algorithms exist to localize outflow tract PVCs. They can be invaluable in pre-procedure planning and patient counseling. We describe a case where the published algorithm for PVC localization did not predict the site of origin and successful ablation site.

Bradyarrhythmias in patients with COVID-19: Marker of poor prognosis?

Background: Despite descriptions of various cardiovascular manifestations in patients with coronavirus disease 2019 (COVID-19), there is a paucity of reports of new onset bradyarrhythmias, and the clinical implications of these events are unknown.

Methods: Seven patients presented with or developed severe bradyarrhythmias requiring pacing support during the course of their COVID-19 illness over a 6-week period of peak COVID-19 incidence. A retrospective review of their presentations and clinical course was performed.

Cardiac arrest in a patient with normal coronary arteries.

We describe the case of a 47-year-old woman who presented with the clinical picture typical for the entity described as transient left ventricular apical ballooning syndrome (Takotsubo cardiomyopathy). She presented with chest pain secondary to vasospasm after an emotional argument. Her coronary anatomy was free of significant atherosclerotic lesions, and her ventriculogram revealed apical ballooning in the shape similar to the round-bottomed Japanese pot used for trapping octopus.

A rare case of "runaway" pacemaker in a modern CPU-controlled pacemaker.

"Runaway" pacemaker is a rare entity that occurs when a malfunctioning artificial cardiac pacemaker abruptly accelerates its pacing rate above the set upper rate limit. This can result in life-threatening dysrhythmia. Runaway pacemaker used to occur more frequently in older model pacemakers, but now with newer pacemaker generators, runaway pacemaker is a rare entity.