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2AT6JKF Fentanyl transdermal 50mcg/hr timed release skin patch and foil wrapper. Credit: MedStockPhotos/Alamy

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Fatal cardiac arrests could be hiding opioid overdose deaths in the US

A study in San Francisco has found that 17 per cent of deaths ascribed to cardiac arrest were actually caused by drug overdose, most commonly opioids

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Some babies who were born prematurely have weaker hearts as adults

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Pumping cold water inside the body could help after heart attacks

Sarah Garfinkel

How signals from the heart influence our thoughts, emotions and memory

Exercise can help lower your risk of cardiovascular disease

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Cholesterol levels predict if under-45s will ever have heart disease

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AI can predict if you’ll die soon 鈥� but we’ve no idea how it works

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Taking blood pressure drugs at night may make them more effective

Your reaction times may be slower during a heartbeat

Mind

Your heartbeat may shape how likely you are to have a car crash

A woman has their heart rate monitored

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High blood pressure in your 40s linked to smaller brain size at 70

A person taking an exam

Technology

Smartwatch app that soothes the nerves helps improve exam results

A smartwatch app that produces a slow, soothing tapping on the wrist seems to help people relax and perform slightly better exams

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Using smart watches to monitor your heart could do more harm than good

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Ren茅 Favaloro: Heart surgery pioneer celebrated in Google doodle

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Stem cell patch may help repair damage caused by heart attacks

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Women who have cardiac arrests are more likely to die than men