This latest recall involves the device's batteries, which are separating due to a "welding defect." 

Former users, however, do not seem to face the same risks as current users. 

The new survey, developed by the American College of Cardiology, included input from program directors throughout the United States. 

Researchers tracked both short- and long-term outcomes, sharing their findings in the Journal of the American Heart Association.

The study's authors hope their equations can make a significant impact on patient care in the years ahead. 

According to new recommendations from the USPSTF, there are two specific vitamins—vitamin E and beta-carotene—that should not be taken to prevent CVD. When it comes to other vitamins, however, more evidence is still needed.