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Cardiologist explains why your heart attack risk doubles at night: ‘This is when blood vessels tighten, blood pressure…’

Updated on: Sep 5, 2025, 08:25:13 IST
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Most people think heart attacks strike randomly. But your highest risk is in the early morning hours, while you’re still in bed. (Freepik)
Most people think heart attacks strike randomly. But your highest risk is in the early morning hours, while you’re still in bed. (Freepik)

Cardiologist highlights that nighttime poses highest heart attack risk due to hormonal surges, particularly for those with inconsistent medication schedules.

Does your heart attack risk double at night? According to Dr Dmitry Yaranov, MD, cardiologist, this becomes true for people who have untreated high blood pressure or unstable plaques, or who just forget taking their heart health medications on time. In an Instagram post shared on September 4, the cardiologist explained how this happens.

Also Read | Cardiologist says smoking for years does not mean quitting won’t help: 1 year after quitting heart attack risk drops 50%

This is how your heart attack risk doubles at night

According to the cardiologist, most people think that heart attacks strike randomly. However, he pointed out that your highest risk is in the early morning hours while you’re still in bed.

He explained that this is the time when stress hormones like cortisol surge, blood vessels tighten, and blood pressure spikes. “For someone with untreated high blood pressure or unstable plaques, that’s a dangerous combination. And here’s what most people miss: if you skip doses, if you take meds at inconsistent times, your body’s defences aren’t ready for that morning surge,” the cardiologist added.

He warned, “Sometimes, the first symptom is the last.”

What is the best time to take blood pressure medicine?

If you take blood pressure medicine, when do you take it: morning or night? According to the National Institutes of Health (NIH), blood pressure medication may confer a larger benefit if taken at night, rather than in the morning. The report highlights a Spanish study of more than 19,000 patients that found that taking the medication so that it works overnight cuts the risk of heart-related death and disease nearly in half.

Per the study's lead author, Ramon Hermida, director of the Bio-engineering and Chrono-biology Labs at the University of Vigo in Spain, “The same medication ingested at different times of the day actually has different pharmacological properties, behaving like a totally different medication.”

Note to readers: This report is based on user-generated content from social media. HT.com has not independently verified the claims and does not endorse them.

This article is for informational purposes only and not a substitute for professional medical advice.

  • Krishna Pallavi Priya
    ABOUT THE AUTHOR
    Krishna Pallavi Priya

    Krishna Priya Pallavi is a journalist with over 9 years of experience, covering health, fashion, pop culture, travel, wellness, entertainment, festivals, mental health, art, decor, fitness, and sex and relationships. She is an alumna of the Indian Institute of Mass Communication (IIMC), Dhenkanal, and holds an undergraduate degree in Journalism and Mass Communication from Guru Gobind Singh Indraprastha University, Delhi. Her strong academic foundation informs her analytical and detail-oriented approach to storytelling, helping her uncover stories where none seem to exist. Before joining Hindustan Times, Pallavi worked with some of India’s leading media organisations. She spent close to three years at India Today, where she honed her newsroom skills and developed a sharp editorial sensibility. She also worked for over a year and a half at Vagabomb, ScoopWhoop’s feminist digital platform, where she explored stories through a gender-sensitive, socially aware lens. Pallavi has a deep interest in global fashion trends and international fashion seasons, and enjoys interviewing celebrities and tracking pop culture movements—interests that frequently translate into engaging, reader-friendly stories. Alongside lifestyle and entertainment, she has a keen eye for impactful health and wellness journalism, regularly interacting with doctors, designers, and digital content creators to bring nuance and credibility to her work. Born and raised in Haryana, Pallavi remains deeply connected to her ancestral roots in Odisha. Her ability to spot fresh angles brings curiosity and depth to stories she pursues. When not chasing deadlines, she enjoys spending time with her dog, planning her next vacation, reading, running new trails, and discovering new destinations.Read More

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