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Medical devices Archive

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Can my phone and other devices interfere with my pacemaker?

Certain devices that use magnetic chargers may interfere with cardiac devices such as pacemakers. A doctor should advise people on which ones to avoid or to use caution when operating.

Low heart rate warnings via smart watch

When a smart watch alert suggests that person's heart rate is below 40 beats per minute, it could be an error, especially if no symptoms are present. But it could signal a heart problem called bradycardia that has many possible causes.

Experimental wireless pacemaker dissolves when no longer needed

A wireless, battery-free device that naturally absorbs into the body within two months may one day be a safer alternative to temporary pacemakers.

Better blood sugar tracking: A benefit for heart health?

A continuous glucose monitor (CGM)—a small device placed on the arm or belly that measures blood sugar every few minutes—may help people with diabetes recognize the eating and exercise habits that hinder (or help) them control their blood sugar. CGM readouts, which are displayed on a smartphone or portable monitor, show your blood sugar values, trends, and the percentage of time that your blood sugar is in a "good control" range. Medicare covers CGMs for people who inject insulin at least three times a day or use an insulin pump to control their blood sugar.

Stroke prevention in atrial fibrillation: Beyond anti-clotting drugs

People with atrial fibrillation who develop or face a high risk of serious bleeding from anti-clotting drugs may be candidates for procedures that block or remove a part of the heart where dangerous blood clots form. About 90% of blood clots in the heart form in the left atrial appendage (LAA), a small pouch that protrudes from the top of the heart. Two procedures prevent clots from escaping from the LAA and causing a stroke. One delivers a device that blocks the opening of the LAA; the other removes most of the LAA during heart surgery done for another reason.

Wearable devices may encourage enough exercise to prevent afib

Getting the recommended amount of physical activity appears to lower the risk of atrial fibrillation (afib), a heart rhythm disorder that raises the risk of stroke.

Screening for atrial fibrillation: An update

Atrial fibrillation (afib), an often-silent heart rhythm disorder, increases the risk of stroke. Early detection may enable people to start taking anti-clotting drugs to prevent a stroke. Current afib screening methods include asking people about afib symptoms and taking an electrocardiogram during routine check-ups. Wearable devices such as smart watches and fitness trackers can detect afib, but they aren’t yet accurate enough to be used for widespread screening.

Listen to your heart

Monitoring one’s heart rate at rest and during exercise is easier than ever. This information can be especially valuable to people with heart conditions and those recovering from an injury or surgery, or returning to exercise after a long layoff. For others, heart rate monitoring can track workout intensity and alert them to slow or fast resting heart rates that may merit a doctor’s visit.

Wearable fitness trackers may aid weight-loss efforts

A review published online March 17, 2021, by the British Journal of Sports Medicine found that fitness trackers helped overweight or obese people with chronic conditions reduce body weight and body mass index.

Treating sleep apnea: Good for your heart and mind?

Obstructive sleep apnea occurs when soft tissue at the back of the throat temporarily blocks the airway during sleep. People with sleep apnea face a heightened risk of high blood pressure, diabetes, heart attack, atrial fibrillation, and stroke. The condition can also affect mood, and some people diagnosed with depression may actually have sleep apnea. Treating apnea with positive airway pressure improves both high blood pressure and depression.

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