Related Experiment Video
Updated: Feb 10, 2026

Invasive Hemodynamic Characterization of the Portal-hypertensive Syndrome in Cirrhotic Rats
Published on: August 1, 2018
Changes of Blood Pressure and Hemodynamic Parameters after Oral Magnesium Supplementation in Patients with Essential
Nikolina Banjanin1, Goran Belojevic2
1Institute of Hygiene and Medical Ecology, Faculty of Medicine, University of Belgrade, 11000 Belgrade, Serbia. nikolina.banjanin@med.bg.ac.rs.
Insights
Oral magnesium supplementation significantly lowered blood pressure in patients with essential hypertension. This essential mineral intake also reduced systemic vascular resistance and left cardiac work, potentially explaining the blood pressure reduction.
Area of Science:
- Cardiology
- Nutritional Science
Background:
- Essential hypertension is a prevalent condition requiring effective management.
- Magnesium plays a crucial role in cardiovascular health and vascular tone regulation.
Purpose of the Study:
- To investigate the impact of oral magnesium supplementation on blood pressure and hemodynamic parameters in individuals with essential hypertension.
- To determine if magnesium supplementation alters key cardiovascular indicators.
Main Methods:
- A single-arm, non-blinded study involving 48 patients with essential hypertension.
- Participants received 300 mg of oral magnesium oxide daily for one month.
- Blood pressure and hemodynamic parameters were measured using impedance cardiography before and after supplementation.
Main Results:
- Significant reductions in both systolic (139.7 to 130.8 mmHg) and diastolic blood pressure (88.0 to 82.2 mmHg) were observed (p < 0.001).
- Key hemodynamic changes included a decrease in systemic vascular resistance index and left cardiac work index (p < 0.05).
Conclusions:
- Daily oral magnesium supplementation effectively lowers blood pressure in patients with essential hypertension.
- The observed reductions in systemic vascular resistance and left cardiac work index may underlie the antihypertensive effects of magnesium.
Abstract:
The objective of this study was to examine the changes of blood pressure and hemodynamic parameters after oral magnesium supplementation in patients with essential hypertension. The single-arm non-blinded intervention study comprised 48 patients (19 men; 29 women) whose antihypertensive therapy was not changed for at least one month. The participants were asked to consume (daily at home) 300 mg of oral magnesium-oxide supplementation product for one month and to have their blood pressure and hemodynamic parameters (thoracic fluid content, stroke volume, stroke index, cardiac output, cardiac index, acceleration index, left cardiac work index and systemic vascular resistance index, heart rate) measured in the hospital before and after the intervention. Measurements were performed with impedance cardiography. After magnesium supplementation, systolic and diastolic pressures were significantly decreased (mean ± standard deviation (SD)/mmHg/from 139.7 ± 15.0 to 130.8 ± 13.4 and from 88.0 ± 10.4 to 82.2 ± 9.0, respectively; both p < 0.001). The two significant hemodynamic changes were the decrease of systemic vascular resistance index (dyn s m²/cm⁵) and left cardiac work index (kg m/m²)/mean ± SD from 2319.3 ± 753.3 to 2083.0 ± 526.9 and from 4.8 ± 1.4 to 4.4 ± 0.9, respectively; both p < 0.05). The observed hemodynamic changes may explain lowering blood pressure after magnesium supplementation.
Related Concept Videos
Hypertension and Regulation of Blood Pressure
Blood Pressure
Blood Pressure
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the...
Measurement of Blood Pressure
Factors affecting Blood pressure
Physiological Factors:
Alterations in Blood Pressure
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart...

