Systolic Time Intervals — What Do They Really Measure?
Heart function depends on electrical impulses and conduction, on loading conditions, contractility and valvular function. An ECG makes electrical impulses and conduction visible and is the single most important noninvasive monitoring parameter of the heart. However, it does not give any data on myocardial function or contractility. Severely disturbed myocardial function such as decompensation of the heart can be detected from clinical signs; jugular palpitation, tachycardia or ankle oedema, but myocardial function is difficult to measure. We would like to know of the patient’s heart has reached its limits or whether there is still a functional reserve, whether heart function is improving under digitalis or after coronary surgery.
KeywordsMyocardial Function Aortic Valve Disease Electrical Impulse Systolic Time Interval Coronary Surgery
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