Page 204 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Action phases of the heart (cardiac cycle)

Ejection
Isovolumetric Isovolumetric
contraction
relaxation Passive
ventricular filling

IVc I IIa IIb III IVa IVb IVc Cardiac Cycle
Ventricular systole Ventricular diastole
1 R T ECG
1mV P Plate 8.3
Atrial systole Q S Q
120 Inzisur

Aortic pressure
Left ventricular mmHg 2
pressure
Left atrial pressure
0
a
Central venous c v a
pressure (CVP) 2
mmHg 3 x y
0
120
Stroke
Left ventricular mL End- volume Atrial
volume 70 diastolic (SV) contraction
volume
(EDV)
4 Residual volume (ESV)
0
500
Flow rate
in aortic root mL/s
5
0
6 I II (III) (IV)
Heart sounds
Duration ms 50 210 60 Considerably heart rate-dependent 191
–1
(ca. 500 ms at 70 min )
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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