A leading heart surgeon has underscored the "biggest red flag" symptom that could be a harbinger of a severe cardiac issue, potentially foreshadowing an imminent heart attack. Heart health remains a pressing global issue, with cardiovascular diseases being responsible for nearly one-fourth of all deaths each year. Early detection of heart problems can be crucial and life-saving.

In an educational clip shared on his Instagram account, American heart surgeon Dr Jeremy London, shed light on several symptoms that should not be overlooked. He emphasised that chest pain, which he described as the "biggest red flag", might indicate that parts of the heart are experiencing a lack of blood flow.

Dr London explained: "Signs that something might be wrong with your heart. The first one is the bigg

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