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They determined that, compared with people who had systolic blood pressure of to mm Hg and diastolic pressure of 70 to 79, people with a systolic blood pressure of mm Hg or higher were more likely to experience heart attacks or strokes, to be hospitalized with heart failure, or to die within a five-year period. But the same was true for heart attacks, heart failure, and death in people with low blood pressure systolic pressure below mm Hg and diastolic pressure under 70 mm Hg.
In an analysis published online April 5, , by The Lancet , German researchers pooled data from two clinical trials involving 31, men and women ages 55 or older who had cardiovascular disease or advanced diabetes. Participants were assigned to take either ramipril Altace , telmisartan Micardis, Activin , both drugs, or neither drug for about five years. The researchers determined that systolic pressures below mm Hg and diastolic pressures below 70 mm Hg were associated with an increased risk of dying from heart disease or any cause compared with systolic pressures between mm Hg and mm Hg and diastolic pressures between 70 and 80 mm Hg.
Diastolic pressures of less than 70 mm Hg were also associated with an increased risk of having a heart attack and hospital-ization for heart failure. The findings about low diastolic blood pressure are intriguing, and they make sense intuitively, Dr.
Conlin says. Diastolic pressure is measured during the point in the heart cycle when blood flows into the coronary arteries that feed the heart. When those arteries are clogged with fatty deposits, blood pressure beyond the narrowed areas will drop as blood works its way through the narrowed channels.
As a result, part of the heart muscle may not get enough blood. Starved for oxygen and nutrients, the heart may become weak and prone to damage.
If you have heart disease, you may want to check that your diastolic blood pressure doesn't fall too far below 70 mm Hg, which can happen when you try to reach a low systolic number.
Going lower than that carries an increased risk of side effects and other adverse events. Everyone is unique. Yet reaching that lower target required an average of three blood pressure medications, which resulted in more side effects. Now, two recent observational studies highlight some concerns about blood pressure that's too low, particularly with regard to diastolic blood pressure.
Diastolic blood pressure the second number in a reading represents the pressure between beats when the heart relaxes. But low diastolic pressure by itself doesn't have any symptoms," says Dr.
One of the new studies, which analyzed the medical records of more than 11, adults over a period of three decades, found that people who had low diastolic blood pressure 60 to 69 mm Hg were twice as likely to have subtle evidence of heart damage compared with people whose diastolic blood pressure was 80 to 89 mm Hg.
Low diastolic values were also linked to a higher risk of heart disease and death from any cause. The findings appeared in the Aug. Another study, published in The Lancet, involved more than 22, people with heart disease, whom researchers grouped according to their blood pressure readings. People with well-controlled blood pressure values to mm Hg systolic and 80 to 89 mm Hg diastolic were considered the reference group. But the same was true for heart attacks, heart failure, and death in people with low blood pressure less than mm Hg systolic and less than 70 mm Hg diastolic.
These results lend further support to the "J curve" phenomenon for blood pressure, where the bottom of the J represents the ideal range for blood pressure. Higher values raise cardiovascular risk, but lower values also seem to raise your risk see graph. The findings about low diastolic blood pressure are intriguing, and they make sense intuitively, Dr. Conlin says. Diastolic pressure is measured during the point in the heart cycle where blood flows into the coronary arteries that feed the heart.
With Sheldon G. Thank you for Subscribing Our Housecall e-newsletter will keep you up-to-date on the latest health information. Please try again. Something went wrong on our side, please try again. Show references Basile J, et al. Overview of hypertension in adults. Accessed March 15, Bavishi C, et al. The American Journal of Medicine. Bakris GL, et al. Isolated systolic hypertension.
Elsevier Saunders; Accessed March 18, Egan BM. Treatment of hypertension in older adults, particularly isolated systolic hypertension. McEniery CM, et al. Isolated systolic hypertension in young people is not spurious and should be treated.
Whelton PK, et al. See also Medication-free hypertension control 6 surprising signs you may have obstructive sleep apnea After a flood, are food and medicines safe to use? Alcohol: Does it affect blood pressure? Beta blockers: How do they affect exercise? Blood pressure chart Blood pressure cuff: Does size matter?
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Blood pressure medications: Can they raise my triglycerides? Even mild dehydration a loss of as little as 1 percent to 2 percent of body weight can cause weakness, dizziness and fatigue. Lack of concentration Blurred vision Cold, clammy, pale skin Rapid, shallow breathing Fatigue Depression. Lowering the Risk Your donation helps empower people everywhere to learn the facts and take action to lower their risk of heart problems.
Donate Now. Decreases in blood volume: A decrease in blood volume can also cause blood pressure to drop. A significant loss of blood from major trauma, dehydration or severe internal bleeding reduces blood volume, leading to a severe drop in blood pressure. Other prescription and over-the-counter drugs may cause low blood pressure when taken in combination with high blood pressure medications. Heart problems: Among the heart conditions that can lead to low blood pressure are an abnormally low heart rate bradycardia , problems with heart valves , heart attack and heart failure.
Severe infection septic shock : Septic shock can occur when bacteria leave the original site of an infection most often in the lungs, abdomen or urinary tract and enter the bloodstream. The bacteria then produce toxins that affect blood vessels, leading to a profound and life-threatening decline in blood pressure.
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