38 MCQs in Physiology for NEET PG
Which ECG finding best distinguishes a prolonged PR interval due to first-degree AV block from a prolonged QT interval?
A 52-year-old man with chronic kidney disease presents with an ECG showing peaked T waves and prolonged QT interval. Which feature best distinguishes hyperkalemia-induced peaked T waves from other causes of T wave peaking?
A 72-year-old woman with chronic atrial fibrillation and a ventricular rate of 110 bpm presents with dyspnoea and fatigue. Her ECG shows irregular RR intervals and a normal QRS duration. She has normal renal function and no signs of heart failure. Which is the drug of choice for acute rate control in this patient?
A 52-year-old man with a history of hypertension presents with palpitations. His 12-lead ECG shows a prolonged QT interval. Which of the following is the most common cause of acquired QT prolongation in clinical practice?
Regarding the normal electrocardiogram (ECG) and its components, all of the following statements are correct EXCEPT:
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