MEDICAL
ARTERIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Right Coronary Artery
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Left Main Coronary Artery
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Sinoatrial Artery
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Atrioventricular Artery
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Detailed explanation-1: -Sinus bradycardia is a cardiac rhythm with appropriate cardiac muscular depolarization initiating from the sinus node and a rate of fewer than 60 beats per minute (bpm). The diagnosis of this condition requires an ECG showing a normal sinus rhythm at a rate lower than 60 bpm.
Detailed explanation-2: -Electrocardiogram (ECG) is the most important noninvasive examination for cardiac ischemia. Complete occlusion of right coronary artery (RCA) usually displays the ST-segment elevation in inferior leads, and ST-segment elevation in precordial leads V1–V3 frequently means the anterior wall or anteroseptal infarction.
Detailed explanation-3: -Occlusion in the left circumflex artery ECG changes resemble those seen in posterior infarction due to occlusion in the RCA, namely ST-segment elevations in V7–V9 and reciprocal ST-segment depressions in V1–V3, along with high R-waves and positive T-waves in the same leads (V1–V3).