Cardiovascular Research · 1967 · 205 citations · 22 references
MedicineCardiologyRadiologyCardiothoracic RadiologyClinical CardiologyElectrophysiologyCardiac ArrhythmiasCardiac AssessmentCardiac ImagingCardiac PacingCardiovascular ExaminationCardiovascular ImagingHeart Size EnlargementPacing Threshold AssessmentPacing Threshold TestingPacing ThresholdsThreshold Level Setting
A threshold level of tension-time index has been found in patients with angina pectoris above which angina occurred. End-diastolic x-ray films showing an increase, rather than the usual decrease, in heart size with increasing rate were thought to explain the absence of a threshold level in some patients.
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