Many studies have shown that people who lack vitamin D are susceptible to heart disease and stroke. But recently, a new study by the Center for Medical Heart Surgery in Salt Lake City in the United States showed that vitamin D levels that are higher than normal also damage the heart. If it will speed up the rhythm of the heart beat, increase the incidence of atrial fibrillation.
"Sad" or "make up" is controversial
As early as 2009, Dr. Tami L Bair of Heidi Medical Center in the United States announced a study at the 2009 American College of Cardiology Scientific Conference that the lack of vitamin D levels is associated with an increased risk of cardiovascular disease and death.
Bair and his colleagues interviewed more than 27,000 elderly people over the age of 50 who did not have a history of cardiovascular disease. After only a year of follow-up, they found that 77% of patients with very low vitamin D levels were more likely to die, and 45% of patients It is easier to develop coronary heart disease. Patients who lack vitamin D levels develop nearly twice as much risk of developing heart failure as people with normal levels.
The final result shows that D-deficient hypertensive patients are twice as likely to have cardiovascular disease symptoms as those with normal vitamin D levels. In patients without hypertension, there was no clear correlation between vitamin D deficiency and cardiovascular disease symptoms.
Researchers believe that maintaining normal levels of vitamin D helps prevent cardiovascular complications.
However, another voice revealed that excessive vitamin D damages the heart. In 2011, a new study presented at the annual meeting of the American Heart Association suggested that excess vitamin D may not be beneficial to the heart, but may even harm the heart.
In the past, scientists had thought that once the nutrient content was low, it would harm the heart. However, this latest study shows that if vitamin D exceeds normal levels, it may increase the chance of atrial fibrillation.
The study, conducted at the Utah Medical Center, involved 132,000 patients. The researchers found that when the levels of vitamin D in the blood of these patients are too high, the risk of atrial fibrillation increases 2.5-fold.
Experts advise: Taking vitamins must be within safe limits
For two reasons, Professor Zhang Wei, director of the Department of Cardiology at the Fuwai Hospital of Cardiovascular Diseases, Chinese Academy of Medical Sciences, stated: “When people obtain nutrients through supplements, excessive vitamin D levels occur because consumers generally believe that The nutritional products purchased on the counter are safe, and they are unaware of the risk of ingesting too much vitamin D." Zhang Jian added that the normal range of vitamin D in a person is between 41 and 80 micrograms per deciliter (ng/l), and the level of vitamin D in a person participating in the study reaches above 100 ng/l. . "For the human body, there are advantages and disadvantages of any kind of vitamins and substitutes. Our goal is to determine a safe dose range so that patients can determine how much dose is good for health and how much toxicity there is."
Finally, Prof. Zhang Wei suggested that patients who were recently diagnosed with AF and were taking vitamin D supplements must remind their doctors if they would do some tests to understand the level of nutrients in the blood of patients and help analyze the production room. Cause of trembling.
Many studies have shown that people who lack vitamin D are susceptible to heart disease and stroke. But recently, a new study by the Center for Medical Heart Surgery in Salt Lake City in the United States showed that vitamin D levels that are higher than normal also damage the heart. If it will speed up the rhythm of the heart beat, increase the incidence of atrial fibrillation.