Ecg MCQ 11+

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• In hypokalemia, ECG shows
  ক

  Prolonged PR interval

  খ

  ST depression

  গ

  Prolonged QT interval

  ঘ

  Prominent U

  ঙ

  Tall and slender
• ECG changes associated with hypokalemia include
  ক

  S-T segment depression

  খ

  Inverted T-waves

  গ

  Reduced P wave height

  ঘ

  Shortened P-R interval

  ঙ

  Prolonged QRS complex
• In normal electrocardiogram
  ক

  Depolarisation of the interventricular septum is recorded by Q wave in V5 & V6

  খ

  Depolarisation away from the positive electrode produces a negative deflection

  গ

  T-wave represents ventricular repolarisation

  ঘ

  Depolarisation proceeds from epicardium to endocardium

  ঙ

  Voltage amplitude does not vary with the thickness of cardiac muscle
• In a normal ECG the
  ক

  P- wave is due to atrial depolarization

  খ

  Q-T interval coincides with refractory period

  গ

  QRS-complex coincides with ventricular systole

  ঘ

  T- wave is due to ventricular depolarization

  ঙ

  P-R interval coincides with atrial systole
• Causes of ST elevation in ECG are
  ক

  Acute pericarditis

  খ

  Ventricular aneurysm

  গ

  Brugada syndrome

  ঘ

  Pulmonary hypertension

  ঙ

  Atrial septal defect
• The physiologic basis of electrocardiography is that
  ক

  The heart is an electrical dipole

  খ

  The heart is located in the center of Einthoven triangle

  গ

  The apices of Einthoven triangle is right arm (Rleft arm (Land right leg (R

  ঘ

  Lead I plus Lead 111 makes Lead II

  ঙ

  A-V nodal delay is 0.3 seconds
• ST segment is elevated in the following conditions
  ক

  Acute myocardial infarction

  খ

  Ventricular aneurysm

  গ

  Pericarditis

  ঘ

  Hypokalaemia

  ঙ

  Digoxin toxicity
• ECG changes in hypocalcaemia includes
  ক

  ST segment prolongation

  খ

  Prolong QT interval

  গ

  ST segment depression

  ঘ

  Prolong QRS complex

  ঙ

  Loss of P wave
• T inversion in ECG is/are a feature of
  ক

  Digoxin toxicity

  খ

  Hyperkalaemia

  গ

  Hypernatraemia

  ঘ

  Mitral valve prolapse

  ঙ

  Myocarditis