- (A) SA node decreases firing
- (B) Increased AV node excitability
- (C) Decreased ventricular contraction
- (D) Tachycardia
Medical Mcqs
- (A) “P” wave
- (B) “Q” wave
- (C) “R” wave
- (D) “T” wave
- (A) Aorta
- (B) Artery
- (C) Arteriole
- (D) Vein
- (A) Hyperplasia
- (B) Hypertrophy
- (C) Fatty infiltration
- (D) Increased amounts of fibrous connective tissue
- (A) Lasts till cardiac contraction
- (B) Longer than refractory period in skeletal muscle
- (C) A phase of cardiac cycle in which heart cannot be stimulated by any amount of stimulus
- (D) Corresponds with duration of action potential
- (E) All of the above
- (A) AV node
- (B) SA node
- (C) SA node
- (D) Purkinje fibers
- (A) 2.5
- (B) 4.25
- (C) 5.25
- (D) 9.5
- (A) Cardiac efficiency
- (B) Cardiac index
- (C) Mean stroke volume
- (D) Mean arterial pressure
- (A) Isotonic relaxation
- (B) Isovolumetric relaxation
- (C) Isovolumetric contraction
- (D) Isotonic contraction
- (A) Increases heart rate
- (B) Decreases myocardial irritability
- (C) Increases force of contraction
- (D) Increases oxygen uptake by heart
