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Shortening of the QT interval of the EKG is associated primarily with increased ventricular contractility rather than heart rate

Cardiac MuscleHeart RateElectrophysiological EvaluationCardiovascular DiseaseIncreased Ventricular ContractilityCardiac MechanicPhysiologyElectrophysiologyCardiovascular PhysiologyPublic HealthMedicineCardiologyQt IntervalDiastolic FunctionArrhythmia