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Potassium chloride supplementation may help manage blood pressure, particularly in individuals with high sodium intake. It can prevent blood pressure spikes related to posture and sodium chloride consumption.
Area of Science:
- Cardiovascular Science
- Nutritional Science
- Hypertension Research
Background:
- Epidemiological and experimental data suggest potassium intake influences blood pressure.
- Individuals with hypertension show a modest reduction in blood pressure with potassium supplementation.
Purpose of the Study:
- To investigate the effects of potassium chloride supplementation on blood pressure and pulse rate in hypertensive males.
- To examine the influence of sodium intake and urinary sodium excretion levels on potassium's blood pressure-lowering effects.
Main Methods:
- 36 male patients with hypertension received 48 mmol/day of potassium chloride.
- Blood pressure and pulse rate were monitored under various conditions, including postural changes and sodium intake levels.
- Patients were stratified based on urinary sodium excretion (less than 75 mmol per 10 mmol creatinine) and sodium responsiveness.
Main Results:
- Potassium chloride did not significantly alter supine blood pressure in the overall group but prevented postural increases in blood pressure and pulse rate.
- In patients with low urinary sodium excretion, potassium chloride prevented postural blood pressure and pulse rate increases.
- Potassium chloride lowered both systolic and diastolic pressures in individuals on a high sodium intake.
- Potassium chloride mitigated the blood pressure elevation induced by sodium chloride in sodium-responsive subjects.
Conclusions:
- Potassium chloride supplementation can reduce blood pressure increases associated with sodium chloride intake.
- Potassium supplementation may mitigate exaggerated sympathetic postural responses in individuals with low sodium intake.
- Dietary potassium plays a role in modulating blood pressure responses to sodium and postural challenges.
Abstract:
Extra potassium intake has been found to be a determinant of blood pressure for epidemiological and experimental reasons. People with hypertension have a small fall in blood pressure with added potassium. Potassium chloride (48 mmol/day) was given to 36 male patients with high blood pressure; 5 did not comply with therapy. In the entire group of patients, potassium chloride had no significant effect on blood pressure, but prevented the rise in blood pressure and pulse rate produced by posture. In patients with a urinary Na+ excretion less than 75 mmol per 10 mmol creatinine, potassium chloride had no effect on supine blood pressure, but prevented the rise in blood pressure and pulse rate with standing. In those on a high sodium intake, potassium chloride lowered both the systolic and diastolic pressures. In sodium-responsive subjects, potassium chloride prevented the rise in blood pressure induced by sodium chloride but had no significant effect on blood pressure when on a low sodium intake. These results indicate that potassium reduces the rise in blood pressure caused by sodium chloride and reduces the increased sympathetic postural response seen in people on a low sodium intake.