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Sick Sinus Syndrome

All About Cardiovascular System and Disorders

Sinus node is the natural pacemaker of the heart which gives out regular electrical pulses to produce each heartbeat. When you exercise or are having a stress, the rate increases gradually. In atrial fibrillation, due to the poor contractions of the upper chambers, blood clots can form in the upper chambers.

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The First 60 Minutes of a Heart Attack: The Golden Hour

Wellnest

Three coronary arteries supply blood to the heart. When one of these arteries becomes completely blocked by a blood clot, it results in a heart attack, also known as MI (Myocardial infarction). Medical and Surgical Treatment in a Heart Attack An MI occurs when a blood clot entirely obstructs a blood artery in the heart.