https://www.livestrong.com/article/271041-malnutrition-and-the-heart-rate/
Copied and pasted from the article above:
Malnutrition shrinks the heart muscle just as it shrinks other muscle groups. Both the overall volume of the heart and the muscle mass of the left ventricle, which pumps blood out to the rest of the body, decrease in size. Decreased muscle mass results in a smaller amount of blood pumped out with each heartbeat. Electrolyte imbalances are also common in malnutrition.
Effects
Bradycardia, an abnormally slow heart rate, often occurs in malnutrition as the body attempts to conserve energy. As many as 95 percent of patients hospitalized for anorexia have bradycardia, the Ohio State University Medical Center reports. Blood pressure falls as the heart rate slows. Irregular heartbeat, medically termed arrhythmia, commonly occurs in people with malnutrition because of electrolyte imbalances.
Copied and pasted from the article above:
Malnutrition shrinks the heart muscle just as it shrinks other muscle groups. Both the overall volume of the heart and the muscle mass of the left ventricle, which pumps blood out to the rest of the body, decrease in size. Decreased muscle mass results in a smaller amount of blood pumped out with each heartbeat. Electrolyte imbalances are also common in malnutrition.
Effects
Bradycardia, an abnormally slow heart rate, often occurs in malnutrition as the body attempts to conserve energy. As many as 95 percent of patients hospitalized for anorexia have bradycardia, the Ohio State University Medical Center reports. Blood pressure falls as the heart rate slows. Irregular heartbeat, medically termed arrhythmia, commonly occurs in people with malnutrition because of electrolyte imbalances.