Module 5- Cardiac physiology

BSC 1086C

Electrocardiogram

Electric signals generated by INTRINSIC cardiac conduction excites cardiac muscle cells

Atrial depolarization

P wave is caused by

Ventricular depolarization

QRS wave is caused by

Ventricular repolarizaion

T wave is caused by

Closure

heart sounds are associated with what of the valves

Systole

Isovolumetric contraction

Diastole

Isovolumetric relaxation

Cardiac cycle

all mechanical events associated with 1 complete heartbeat

Contraction

Systole=

Relaxation

Diastole=

Diastole

Which phase lasts longer

4.7-5.7 l/min

Normal CO

60-100bpm

Normal HR

70ml

Normal SV

120ml

Normal EDV

50ml

Normal ESV

4.5-5.5ml

How much blood does gender neutral person have

Afterload

Does not influence heart rate

Epinephrine

Positive chronotropic factor

Acetylcholine

Negative chronotropic factor

Increase

Does SV increase or decrease preload

Decrease

Does SV increase or decrease preload afterload

Increase

Does SV increase or decrease contractility