A) right bundle branch has dual blood supply from RCA and LAD B) left anterior fascicle has dual blood supply from LAD and RCA C) left posterior fascicle has dual blood supply from LAD and RCA D) AV node is supplied by dominant coronary artery Answer (Select an option above to get the answer):
(Single Best Answer) Question 62: A 26 year old lady came with the complaints of fever with altered sensorium and reduced urine output of 1 week duration. On evaluation her hemoglobin was 7 gm/dl, platelet count of 30,000/cu.mm with peripheral smear showing schistocytes. Serum creatinine was 3 mg/dl. Prothrombin time and activated partial thromboplastin time were normal. Enzyme most likely to be deficient in this situation is ?
A) hexokinase B) pyruvate kinase C) ADAMTS 13 D) glucose-6-phosphate dehydrogenase Answer (Select an option above to get the answer):
(Single Best Answer) Question 63: Assertion: under stress myocardial oxygen delivery increases dominantly due to increased extraction of oxgen from blood
Reason: oxygen extraction is almost maximal under resting conditions
A) Both Assertion and Reason are true, and Reason is the correct explanation for Assertion B) Both Assertion and Reason are true, and Reason is not the correct explanation for Assertion C) Assertion is true, but Reason is false D) Assertion is false, but Reason is true Answer (Select an option above to get the answer):
(Single Best Answer) Question 64: Which of the following drug / durgs has / have the potential to precipitate decompensation in patients with chronic heart failure 1. Allopurinol 2. Rosiglitazone 3. Alpha Adrenergic blockers 4. Non steriodal anti-inflammatory drugs
A) Only 1, 2 and 3 are correct B) Only 1 and 3 are correct C) Only 2 and 4 are correct D) Only 4 is correct Answer (Select an option above to get the answer):
(Single Best Answer) Question 65: Which of the following measure / measures is / are highly recommended by ACC/AHA in the treatment of patients with endstage heart failure 1. cardiac transplantation 2. intermittent infusion of positive inotrope agents 3. left ventricular assist device in patients expected to survive for less than a year with medical therapy 4. mitral valve repair for severe secondary mitral regurgitation
A) Only 1, 2 and 3 are correct B) Only 1 and 3 are correct C) Only 2 and 4 are correct D) Only 4 is correct Answer (Select an option above to get the answer):
(Single Best Answer) Question 66: Assertion: during percutaneous coronary intervention smaller ST segment changes are noticed in balloon inflations subsequent to initial inflation
Reason: ischemic preconditioning is the proposed mechanism for cardiac protection
A) Both Assertion and Reason are true, and Reason is the correct explanation for Assertion B) Both Assertion and Reason are true, and Reason is not the correct explanation for Assertion C) Assertion is true, but Reason is false D) Assertion is false, but Reason is true Answer (Select an option above to get the answer):
A) complete RBBB B) WPW syndrome C) complete LBBB D) electronically paced ventricular rhythm Answer (Select an option above to get the answer):
(Single Best Answer) Question 68: Large v waves on pulmonary capillary wedge (PCW) tracing are seen in all of the following except ?
A) papillary muscle dysfunction B) rheumatic mitral regurgitation C) acute AR D) ventricular septal defect Answer (Select an option above to get the answer):
A) significant increase in heart rate and blood pressure B) significant increase in heart rate with no significant change in BP C) significant increase in heart rate with significant fall in BP D) inappropriate increase in resting heart rates with no significant further change Answer (Select an option above to get the answer):
(Single Best Answer) Question 70: A 50 year old man, an alcoholic and a smoker presents with a 3 hours history of increasing shortness of breath and chest pain. He started having this pain while eating, which was constant and radiated to the back and interscapular region. He was a known hypertensive. On examination, he was cold and clammy with a heart rate of 130/min, and a BP of 80/40 mm Hg. JVP was normal. All peripheral pulses were present and equal, and ejection systolic murmur was heard. Which one of the following is the most likely diagnosis ?
A) acute aortic dissection B) acute myocardial infarction C) rupture of the esophagus D) acute pulmonary embolism Answer (Select an option above to get the answer):