Heart attack risk doubles at night: Cardiologist explains why blood vessels tighten and blood pressure spikes

Heart attack risk doubles at night due to stress hormones and blood pressure spikes. Dr Dmitry Yaranov advises timely medication and blood pressure checks. Nighttime heart attacks are dangerous because symptoms are unnoticed. Blood vessels constrict, raising blood pressure. Reduce risk by taking medicines, monitoring blood pressure, and adjusting lifestyle. Regular check-ups are important.