Disorders of heart rate, rhythm and conduction/ atrioventricular and bundle branch block MCQ 8+

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• Causes of atrial fibrillation are
  ক

  Mitral valvular disease

  খ

  Myocarditis

  গ

  Hypertension

  ঘ

  Hyperthyroidism

  ঙ

  Hyperparathyroidism
• Ventricular extrasystoles
  ক

  From the same focus have similar QRS complexes

  খ

  May fail to produce a pulse at the wrist

  গ

  Are usually associated with a normal QRS complex

  ঘ

  Usually occur following a compensatory pause

  ঙ

  Indicate serious heart disease
• Which ECG feature/s is/are pathognomic of ventricular tachycardia?
  ক

  Capture beat

  খ

  Atrioventicular (Adissociation

  গ

  Fusion beat

  ঘ

  Wide QRS complex

  ঙ

  Regular R-R interval
• Aetiology of complete heart block are
  ক

  Acute myocardial infarction

  খ

  Following aortic valve replacement

  গ

  Phaeochromocytoma

  ঘ

  Thyrotoxicosis

  ঙ

  Duchenne muscular dystrophy
• Following can be found in acquired complete heart block
  ক

  Pulse rate is <50/minute

  খ

  Syncope is a presentation

  গ

  Cannon wave is present

  ঘ

  Pulse is irregularly irregular

  ঙ

  Heart sounds are normal
• Features of complete heart block include
  ক

  Regular heart rate

  খ

  Irregular cannon ‘a’ wave

  গ

  Variable intensity of first heart sound

  ঘ

  Paradoxial splitting of second heart sound

  ঙ

  A mid-diastolic murmur at the apex
• In atrial fibrillation
  ক

  First heart sound is variable

  খ

  There is increased risk of stroke

  গ

  P wave is tall in lead I and aVL in ECG

  ঘ

  Peripheral pulse rate is more than heart rate

  ঙ

  Pulse is regularly irregular