Monday December 9, 2019

Suffering From Low Blood Pressure? Do an Hour or More of Daily Exercise

Exercise regimens during space flight, followed by saline injections after landing, were sufficient to prevent the condition from occurring

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The study is the first to examine the condition called "orthostatic intolerance" during daily activities when the astronauts returned home. Pixabay

Suffering from low blood pressure? Do an hour or more of daily exercise and stay hydrated to improve the condition and control fainting or dizziness episodes, finds a NASA-funded study on astronauts.

The study is the first to examine the condition called “orthostatic intolerance” during daily activities when the astronauts returned home.

The researchers found that exercise regimens during space flight, followed by saline injections after landing, were sufficient to prevent the condition from occurring.

“Doing an hour or more of daily exercise was sufficient to prevent loss of heart muscle, and when it was combined with receiving hydration on their return, the condition was prevented entirely. We expected to see up to two-thirds of the space crew faint. Instead, no one fainted,” said cardiologist Dr Benjamin Levine from UT Southwestern Medical Center.

Blood Pressure, Daily, Exercise
Suffering from low blood pressure? Do an hour or more of daily exercise and stay hydrated to improve the condition and control fainting or dizziness episodes. Pixabay

A similar condition is also diagnosed in patients as Postural Orthostatic Tachycardia Syndrome (POTS), which is predominantly found in women. The dizziness that it causes is life-changing and can be debilitating.

Dr Levine has helped one Dallas patient return to a normal life.

For the study, published in the journal Circulation, the researchers used a small blood pressure cuff on astronauts’ finger to measure blood pressure and every heartbeat.

These measurements were taken during multiple 24-hour periods before, during, and after six months of spaceflight. Twelve astronauts were involved — eight men and four women.

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This treatment is just one of the ways medicine, heart research, and space travel have connected throughout Dr Levine’s work. The successful moon landing in 1969 was an early influence on his career.

The early interest led Dr Levine into space research within the field of cardiology, and he began working with the space shuttle programme in 1991.

“We put a catheter in an astronaut’s heart — it was former UT Southwestern faculty member Dr Drew Gaffney — and sent him into space. It was probably the most expensive right-heart catheterization ever,” Dr Levine reminisced.

“Much of our early research was devoted to understanding why astronauts faint when they return from space. Now, we can prevent it from happening”. (IANS)

Next Story

Women who Exercise Vigorously Face Lower Mortality Risk, Says New Study

"The best situation is to have normal heart performance during exercise and good exercise capacity," Peteiro added

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Regular exercise is highly beneficial for all patients with Heart disease regardless of age, a new study has said, adding that patients who benefited most from cardiac rehabilitation were those who started out with the greatest physical impairment. Pixabay

Women who exercise vigorously are at significantly lower risk of dying from heart disease, cancer and other causes, reveals a new study.

The study, presented at EuroEcho 2019, a scientific congress of the European Society of Cardiology (ESC), examined exercise capacity and heart function during exercise in women and their links with survival.

The study included over 4,000 adult women referred for treadmill exercise echocardiography because of known or suspected coronary artery disease.

“Exercise as much as you can. Fitness protects against death from any cause,” said study author Jesus Peteiro from University Hospital A Coruna in Spain.

For the findings, participants walked or ran on a treadmill, gradually increasing the intensity, and continuing until exhaustion.

Images of the heart were generated during the test. Fitness was defined as a maximal workload of 10 metabolic equivalents (METs), which is equal to walking fast up four flights of stairs or very fast up three flights, without stopping.

Women who achieved 10 METs or more (good exercise capacity) were compared to those achieving less than 10 METs (poor exercise capacity).

During a median follow-up of 4.6 years there were 345 cardiovascular deaths, 164 cancer deaths, and 203 deaths from other causes.

After adjusting for factors that could influence the relationship, METs were significantly associated with lower risk of death from cardiovascular disease, cancer, and other causes.

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Regular jogging was found to be the best type of exercise. Pixabay

The annual rate of death from cardiovascular disease was nearly four times higher in women with poor, compared to good, exercise capacity (2.2 per cent versus 0.6 per cent).

Annual cancer deaths were doubled in patients with poor, compared to good, exercise capacity (0.9 per cent versus 0.4 per cent).

The annual rate of death from other causes was more than four times higher in those with poor, compared to good, exercise capacity (1.4 per cent vs 0.3 per cent).

“Good exercise capacity predicted lower risk of death from cardiovascular disease, cancer, and other causes,” Peteiro said.

The researcher noted that most study participants were middle aged or older women: the average age was 64 and 80 per cent were between 50 and 75.

“The results were the same for women over 60 and less than 60 although the group under 50 was small,” said Peteiro.

Regarding imaging of the heart, the researchers assessed function of the left ventricle (one of the heart’s pumping chambers) during the exercise test.

Patients with poor heart function during exercise had a higher probability of death from cardiovascular disease during follow-up.

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Heart function during exercise did not predict the likelihood of death from cancer or other causes.

“Looking at both examinations together, women whose heart works normally during exercise are unlikely to have a cardiovascular event. But if their exercise capacity is poor, they are still at risk of death from cancer or other causes,” Peteiro said.

“The best situation is to have normal heart performance during exercise and good exercise capacity,” Peteiro added. (IANS)