What question did this study set out to answer?

To establish normal standards and understand factors affecting the intrinsic heart rate (IHR) in healthy adults.

The normal range and determinants of the intrinsic heart rate in man

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Population

432 healthy adult subjects aged 16 to 70 years

Design

Cross-sectional

Authors

Age may refine IHR reference values in healthy adults; leaves open its added prognostic value beyond age.

To establish normal standards and understand factors affecting the intrinsic heart rate (IHR) in healthy adults.
Measured intrinsic heart rate in 432 healthy adults aged 16 to 70 years
Observed IHR at rest under normal body temperature conditions
Analyzed age as a determinant of IHR variation among individuals.
Intrinsic heart rate showed high reproducibility among subjects
Age emerged as the primary factor influencing variations in IHR
Differences in IHR correlate with differences in the functional capacity of the myocardium.

Population

432 healthy adult subjects aged 16 to 70 years

Outcome

Intrinsic heart rate (IHR)surrogate

Age is the primary determinant of intrinsic heart rate in healthy adults, which may reflect differences in myocardial functional capacity.

Jose et al. (1970) studied this question.

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