Sunil Kapur

Data Availability Statement The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions. References 1, , , et al., “The Development of the Extravascular Defibrillator With Substernal Lead Placement: A New Frontier for Device-Based Treatment of Sudden Cardiac Arrest,” Journal of Cardiovascular Electrophysiology 33, no. 6 (2022): 1085–1095.

Ask the doctor March 6, 2026 Reviewed by Sunil Kapur, MD, Contributor Share Print This Page What does it mean when the doctor diagnoses a condition called ventricular bigeminy? What are its causes and symptoms, and is it ever dangerous? The pattern happens when the heart contracts a fraction of a second earlier than it should, triggering a premature beat.

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