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What is systole in the cardiac cycle?
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Systole is the phase of the cardiac cycle when the heart muscle contracts, pumping blood from the chambers into the arteries.
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How does diastole differ from systole?
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Diastole is the phase of the cardiac cycle when the heart muscle relaxes, allowing the chambers to fill with blood.
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What are the main goals of systole and diastole?
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The main goal of systole is to push blood out of the heart, while diastole aims to fill the heart with blood.
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Which valves open during systole?
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During systole, the aortic and pulmonary valves open to allow blood to flow from the heart to the body and lungs.
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Which heart sounds are associated with systole and diastole?
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The 'lub' sound corresponds to the beginning of systole, while the 'dub' sound corresponds to the end of systole and the start of diastole.
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What is cardiac arrest?
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Cardiac arrest is a sudden loss of heart function, resulting in the cessation of normal blood circulation.
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How does cardiac arrest differ from a heart attack?
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Cardiac arrest is an electrical malfunction of the heart leading to a stop in blood flow, whereas a heart attack is a blockage of blood flow to a part of the heart muscle.
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What is a heart attack, medically termed as?
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A heart attack is medically termed as a myocardial infarction.
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What are common symptoms of a heart attack?
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Common symptoms include chest pain, shortness of breath, nausea, and discomfort in other areas of the upper body.
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What immediate action should be taken if someone is in cardiac arrest?
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Immediate CPR and use of an automated external defibrillator (AED) should be performed, and emergency services should be contacted.
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Can diastolic or systolic dysfunction lead to heart conditions?
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Yes, dysfunction in either systole or diastole can contribute to heart failure or other cardiac conditions.
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What happens to blood pressure during systole?
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Blood pressure rises during systole due to the contraction of the heart pumping blood into the arteries.
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What might an abnormal diastolic phase indicate?
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An abnormal diastolic phase may indicate issues like diastolic heart failure, where the heart doesn't relax properly.
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Why is timely intervention important in a heart attack?
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Timely intervention can restore blood flow, limit damage to the heart muscle, and increase survival rates.
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How can lifestyle changes impact one's risk for heart attacks?
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Healthy lifestyle changes like diet, exercise, and smoking cessation can significantly reduce the risk of heart attacks.
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