Assessment
Assessment of Ventricular Function
Ventricular Function Curve
Systolic Function
Diastolic Function
Ejection Fraction
-cardiac output / preload
-stroke volume / preload
ventricular pressure-volume diagrams
-distinguishes the effect of both preload and afterload on cardiac contractility
ESP: end systolic point: indicative of systolic function
EDP:end diastolic point: indicative of diastolic function
assessment of systolic function
-change of ventricular pressure/ change in time = measure of contractility
EF = (EDV – ESV) / EDV
-clinically the most commonly used measurement for systolic function
-normal EF = 0.67 +/- 0.08
Preoperative measurement of ejection fraction may be via:
-cardiac catherization
-radionucleotide studies
-transthoracic echocardiography
-transesophageal echocardiography
assessment of diastolic function
measures diastolic flow velocity across the mitral valve
clinical assessment of diastolic function by:
-doppler echocardiogram
-transthoracic echocardiography
-transesophageal echocardiography
three patterns of diastolic dysfunction
-isovolumetric relaxation time
-ratio of peak early diastolic flow to peak atrial systolic flow
-deceleration of E (Dte)
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