Match the electrical events of the heart to the mechanical events and the cardia

Question

Match the electrical events of the heart to the mechanical events and the cardiac cycle as listed below.

Electrical Events:

P wave QRS complex T wave P-R Interval P-R Segment Q-T segment S-T Segment

Mechanical Events:

Late Diastole; Atrial systole; Isovolumic ventricular contraction; Ventricular systole Isovolumic ventricular relaxation

Cardiac cycle

1. SA node depolarizes 2. Electrical activity goes rapidly to AV node via internodal pathways 3. Depolarization spreads more slowly across atria. Conduction slows through AV node. 4. Depolarization moves rapidly through ventricular conducting system to heart (Electrical signals enters the ventricles via AV bundle and travels through bundle branches) 5. Wave of depolarization spreads upward from apex via purkinje fibers.

Explanation / Answer

P Wave :Atrial Systole

QRS Complex:Isovolumic Ventricular Contraction

T Wave:Isovolumic Ventricular Relaxation

P-R Interval:time between atrial and ventricular depolarisation

P-R Segment:Delay at AV node

Q-T Segment:Duration of ventricular systole

S-T Segment :time between ventricular depolarisation and repolarisation

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