Why the study?
Does the deviation of the actual K coefficient from Bazett's constant K correlate with the presence and severity of heart failure in patients with ischemic heart disease and hypertension?
Does the deviation of the actual K coefficient from Bazett's constant K correlate with the presence and severity of heart failure in patients with ischemic heart disease and hypertension?
The percentage deviation of the actual K coefficient from Bazett's constant K on ECG may serve as a simple, non-invasive indicator of myocardial contractility dysfunction and heart failure severity.
K deviation was associated with HF severity; leaves open its value as ECG contractility marker pending prospective validation.
It is substantiated that the duration of ventricular systole is a measure of myocardial contractility and heart failure. Heart failure is based on myocardial systole impairment, which can be detected by ventricular systole duration/ the deviation of the actual component from the constant K in Bazett formula is systolic function impairment indicator. Actual component indicator is close to constant K at healthy people. Percent of deviations is equal to 1,3±0,5. Constant K could be used as a control indicator for determining deviation percent from the actual K coefficient. The increase in coefficient K is in direct proportion from heart failure severity. It is not always possible to detect heart contractility abnormalities during the first stages of heart failure. In these cases stress tests are useful. The coefficient K increasing during exertion and detects the heart contractility abnormalities. All patients with arterial hypertension and ischemic heart disease have impaired heart muscle contractility and signs of congestive heart failure. Congestive heart failure is based on the heart muscle disorder.
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Malov et al. (2017) studied this question.
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