During the COVID-19 pandemic, some patients would be tested with an oximeter only for it to read above 99 percent. Yet, during a medical checkup, they would be found to have a “lack of oxygen in the heart,” or hypoxia. Why is this?
It has to do with the type of hypoxia one has. According to Dr. Chungpin Liu, a cardiologist and the director of Yupin Clinic in Taiwan, there are three types of hypoxia.
The first is caused by not inhaling enough oxygen. For instance, drowning, choking on food, having a COVID-19 infection, or having other lung diseases, can cause low blood oxygen.
Dr. Liu pointed out that this condition is a systemic hypoxia. Such patients can detect a lowered oxygen concentration in their blood when testing with an oximeter.
The second type is due to poor blood supply. The reason may be that the patients’ blood vessels are naturally prone to spasm, resulting in poor blood flow. Or, due to poor lifestyle habits, fat and bad cholesterol accumulate on blood vessel walls, which become thicker and thicker, causing the blood vessels to become narrower and harder. This will eventually result in atherosclerosis, which prevents blood from flowing smoothly to the tissues.
If the blood supply to the tissues and organs is poor, local hypoxia will occur. For example, when the heart gets less oxygen, it will cause cardiac hypoxia.
Dr. Liu pointed out that most types of hypoxia, including heart hypoxia, are local, which cannot be detected by an oximeter.
Other cases of local hypoxia due to poor blood supply include limb necrosis caused by an accident, in which a limb is crushed by a heavy object, or when people tie a rubber band around their fingers, which turn black due to reduced blood flow.
The third is the insufficient ability of red blood cells to carry oxygen.
Neglecting 3 Symptoms of Hypoxia Can Cause Heart Failure and Myocardial Infarction
Heart hypoxia can also be called hypoxic lesions and ischemic heart disease, as its most important factor is the blockage of the coronary arteries in the heart. The occurrence of hypoxia can be chronic or acute.- Acute cardiac hypoxia
- Chronic cardiac hypoxia
Its cause is mainly poor blood supply, and another cause is related to anemia. According to Dr. Liu, during the clinical diagnosis process, a doctor will check whether the patient’s hemoglobin is sufficient at the same time.
Chronic cardiac hypoxia symptoms: chest tightness, chest pain, and shortness of breath. If you are prone to these conditions while walking or exercising, you should be extra careful.
Many people suffer from high cholesterol and smoking, making their blood vessels increasingly narrow and causing wheezing and chest pain when they walk. Nevertheless, people often consider this a minor issue and ignore it when the symptoms disappear. Dr. Liu pointed out that if not treated immediately, after a long period of time, heart hypoxia may lead to increasing weakness when doing activities, severe arrhythmia, heart failure, and myocardial infarction.
More Middle Aged and Male Patients
If we don’t take menopause into account, the majority of heart hypoxia patients below the age range of menopause are men. Women prior to menopause are protected by female hormones and have better cardiovascular health. In most female patients, cardiovascular diseases start to develop after menopause. Therefore, after menopause, the proportions of men and women with cardiovascular diseases become similar.Cardiac hypoxia is more likely to occur in patients between the ages of 45 and 65, in both men and women. And it is mostly caused by the narrowing and hardening of blood vessels, which is related to aging, cholesterol and smoking.
“If a person starts smoking and eating a diet high in oil and sugar when he or she is young, after the accumulation for over 20 years, he or she will be prone to heart hypoxia, upon reaching the age of 40, and the fastigium (period when symptoms of disease are most pronounced) starts at the age of 45,” Dr. Liu said.
5 Types of Food to Prevent Heart Hypoxia
There are also some foods beneficial to our blood vessels and blood cells.- Foods containing soluble dietary fiber
- Fish
Protein helps with the production of red blood cells; and omega-3 has a preventive effect on atherosclerosis, as it helps remove fat from blood vessels and stabilize atherosclerotic plaques.
- Allium and cruciferous vegetables
Organosulfur compounds may also prevent atherosclerosis and the reocclusion of treated coronary arteries.
- Meat, fish, and shellfish
Meat, fish, and shellfish are ideal iron-rich foods, because the human body’s absorption rate and utilization rate of animal iron are better than those of plant iron.
In addition, when eating iron-containing foods, it is important to eat vitamin C-rich fruits and vegetables at the same time to promote iron absorption.
- Eggs
A balanced diet is a natural way to get the aforementioned nutrients. Dr. Liu shared with us that his patients have improved their heart hypoxia after taking medication, developing good dietary habits, and exercising properly.