Cardiac Quiz: Understanding Heart Health
Larry Weinrauch, M.D. | April 12, 2012
- 1 Six weeks
- 0 Eight weeks
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When does the human heart start to beat?
We can actually see the fetal heart beating when a pregnant woman has an ultrasound by about six weeks.
When does the heart rest?
The only time the heart actually rests is between beats. When we sleep, the heart rate decreases, and therefore there is more time between beats so that the heart can rest more. This was one of the reasons for bed rest after heart attacks, but we now have medications that keep the heart rate slow to permit more "rests."
Which food has the least amount of cholesterol?
The olives have no cholesterol, which is mostly found in animal products. Learn more about [healthy food choices](https://www.healthcentral.com/article/how-to-snack-healthy), [saturated and trans fats](https://www.healthcentral.com/article/the-lowdown-on-saturated-and-trans-fats), and [controlling portion size](https://www.healthcentral.com/article/visual-aids-to-help-estimate-portions).
Which food should be eaten once a week, but may need to be limited in pregnant women?
Tuna has a fairly high concentration of mercury and this can be harmful to the developing brain. Frying a fish removes the benefits of eating fish from the heart health point of view. Beef and turkey are good sources of protein, but there is no evidence that supplementing a diet with these products can reduce heart disease, or that they need to be limited during pregnancy. Learn more about the heart benefits of omega-3 fatty acids and the relationship between [fish oil and heart disease](https://www.healthcentral.com/article/fish-oil-and-heart-disease).
Which vitamin is most necessary for proper cardiac function?
Vitamin B is a water-soluble vitamin that is very necessary for proper cardiac function (actually there are several B vitamins). Water-soluble vitamins can be lost through diuretics, gastrointestinal disorders and dialysis. If adequate levels are not present, heart muscle function can deteriorate and heart failure can occur. Vitamins A, D, K and E are fat-soluble and will cause many problems in excess. They stay in the body a long time, and the FDA limits how much can be present in food. It is hard to take too much vitamin B complex without feeling sick, it is easy to take too many fat-soluble vitamins and get sick.
How many chambers does the human heart have?
There are two upper chambers called the atria which act to "prime the pump" of the two lower chambers called ventricles that pump the blood through the body and lungs. The right atrium and right ventricle pump darkish, "used" blood through the lungs to get more oxygen, and the left atrium and ventricle pump the bright red, newly oxygenated blood back to the rest of the body so that all of our functions are maintained.
For a 50-year-old woman, what is the greatest risk factor for not reaching 75 years of age?
Learn more about the relationship between diabetes and heart disease by reading the following articles: [Understanding the Link Between Heart Disease and Diabetes](https://www.healthcentral.com/article/diabetes-awareness-month-understanding-the-link-between-heart-disease-and-diabetes) [Silent Heart Disease in Diabetes](https://www.healthcentral.com/article/silent-heart-disease-in-diabetes-why-dont-i-feel-it) [Lowering Your Risk of Disease Complications](https://www.healthcentral.com/article/lowering-your-risk-of-disease-complications)