Willems et al reported several equations for predicting the left ventricular ejection time (LVET). Most are relatively simple and easy to calculate. The authors are from the University of Leuven in Belgium.
Patient selection: adult
Parameters:
(1) gender
(2) heart rate in beats per minute
(3) age in years
(4) systolic blood pressure in mm Hg
(5) ischemic heart disease
LVET in males
LVET in milliseconds =
= 434 - (1.93 * (heart rate))
= 392 - (1.539 * (heart rate)) + (0.156 * (age)) + (0.038 * (systolic blood pressure))
= 428 - (1.79 * (heart rate)) if no history of ischemic heart disease
= 435 - (1.90 * (heart rate)) if history of ischemic heart disease
LVET in females
= 422 - (1.58 * (heart rate))
= 370 - (1.494 * (heart rate)) + (0.276 * (age)) + (0.153 * (systolic blood pressure))
= 421 - (1.57 * (heart rate)) if no history of ischemic heart disease
= 423 - (1.60 * (heart rate)) if history of ischemic heart disease
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Specialty: Cardiology, Emergency Medicine, Pulmonology
