Women at increased risk of fatal, nighttime cardiac arrest: Study ANI | Updated: Feb 07, 2021 10:20 IST Washington [US], February 7 (ANI): Women are at a higher risk than men to suffer sudden death due to cardiac arrest during nighttime hours, suggested a new study. The findings were published in the journal 'Heart Rhythm'. The study, led by the Center for Cardiac Arrest Prevention in the Smidt Heart Institute, has found for the first time that during nighttime hours, women are more likely than men to suffer sudden death due to cardiac arrest. "Dying suddenly during nighttime hours is a perplexing and devastating phenomenon," said Sumeet Chugh, MD, senior author of the study and director of the Center for Cardiac Arrest Prevention.