Cardiovascular effects of parathyroid hormone: a study in healthy subjects and normotensive patients with mild primary hyperparathyroidism

What Was Tested

Researchers studied Parathyroid Hormone (PTH 1-84) in the context of hyperparathyroidism in this randomized controlled trial publication.

The aim of the study was to evaluate: 1) the cardiovascular function and the autonomic drive to the heart in patients affected by primary hyperparathyroidism (pHPT) with no evidence of renal and cardiovascular complications; 2) the cardiovascular effects of acute administration of PTH in normal subjects.

Why It Was Studied

In 14 patients affected by mild asymptomatic pHPT echocardiographic assessment of cardiovascular function and of the mechanic properties of the brachial and carotid artery, heart rate variability and the dispersion of QT interval were performed before and 6 months after successful surgery.

Who Took Part

The abstract describes 14 patients taking part.

PubMed indexes the participants as adults, middle-aged adults and older adults, both men and women.

Twenty age- and sex-matched healthy subjects were included in the study.

How the Study Was Run

The researchers set it up as a randomized, single-blind, placebo-controlled and crossover study.

The patients were allocated by chance, so the Parathyroid Hormone (PTH 1-84) group and the comparison group should start out alike.

In this single-blind Parathyroid Hormone (PTH 1-84) study one party knew the assignments and the other did not.

A placebo (an inactive look-alike) gave the Parathyroid Hormone (PTH 1-84) group a baseline to be compared against.

Each person switched between Parathyroid Hormone (PTH 1-84) and the comparison at some point, usually with a gap in between.

What Was Measured

In 14 patients affected by mild asymptomatic pHPT echocardiographic assessment of cardiovascular function and of the mechanic properties of the brachial and carotid artery, heart rate variability and the dispersion of QT interval were performed before and 6 months after successful surgery.

Echocardiographic assessment of cardiovascular function, heart rate variability, and QT interval were performed between 20 and 25 min after the start of the infusion and repeated after 15 min of tilting at 60 degrees.

The subject headings attached to it are Blood Pressure, Brachial Artery, Calcium, Cardiac Output, Carotid Arteries, Circadian Rhythm and Diastole.

What This Means in Plain Language

The paper is a randomized, single-blind and placebo-controlled study of Parathyroid Hormone (PTH 1-84) in 14 patients in people with hyperparathyroidism.

With fewer than 40 people, it is a small study, so it is better read as an early signal for further research than as a settled answer.

The publication is from 2000 (The Journal of clinical endocrinology and metabolism), a journal based in United States.

More context: the Parathyroid Hormone (PTH 1-84) compound page, Hyperparathyroidism research.