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People with chronic constipation may be more prone to heart disease, but the connection remains unclear. Straining and bearing down to have a bowel movement can temporarily boost blood pressure, putting the cardiovascular system at risk. And a possible link between constipation and blood clots may be worth further study. In rare cases, clots form in the veins that serve the gastrointestinal organs, including the large intestine (colon). Known as splanchnic venous thrombosis, the problem seems to be far more common in people with constipation than in those without.

Palliative care, which focuses on comfort and quality of life, is gradually becoming more widely used in people with advanced heart failure. The approach includes discussions about advance care planning and is often confused with hospice care. But palliative care can begin at any stage of a serious illness. For heart failure, it may include tiny doses of morphine to ease breathing and help people feel less distressed. Increasing doses of diuretics, which help flush fluid from the body, are often prescribed as well.

High-intensity interval training (HIIT) may improve fitness faster because people exercise harder rather than longer. HIIT features short bursts of high-intensity exercise (usually lasting one to four minutes) interspersed with periods of lower-intensity activity or rest. People who are older or who have heart disease should check with their doctors before trying HIIT. HIIT may produce equal or greater improvements in blood pressure and blood sugar compared with moderate-intensity exercise. But in terms of longevity, both exercise strategies seem to be equally beneficial.

Ejection fraction is the fraction of the blood that the heart “ejects” out to the rest of the body each time it contracts. A normal ejection fraction is about 55% to 70%. Levels below 40% indicate reduced ejection fraction and may result in heart failure symptoms.

An array of products that encourage people to relax can be good holiday gifts for friends and loved ones who need to reduce their stress levels. Suggestions include a year’s subscription to a meditation app; yoga props such as a mat, blocks, and straps; devices that enable self-massage of the upper body; and products that may foster sound sleep, such as a weighted blanket, a noise machine, and scented bath salts.

A study published online Sept. 6, 2021, by the journal Gut suggests that people who eat the most fruits, vegetables, and legumes have a lower risk of getting COVID and its complications, compared with people who eat the least.

Sleeping six hours or less is associated with impaired cognition, mostly in memory, as well as an increase in the protein that can form brain plaque. Sleeping nine hours or more is also linked to cognitive problems, especially in decision making.

People with the highest daily flavonoid intakes were 19% less likely to report trouble with memory and thinking, compared with people who had the lowest daily flavonoid intakes, according to a Harvard study published online July 28, 2021, by Neurology.