Please wait...



Marijuana is no longer illegal everywhere, as many states have legalized its usage for both medicinal and recreational purposes. It is a commonly used drug. In recent years, more reports have emerged about marijuana’s cardiovascular side effects. These side effects may be uncommon, but they can still be potentially harmful.

Some studies and theories state that marijuana slows down the blood flow in the coronary arteries. One study showed a patient passing out after marijuana usage; this patient developed dangerous heart rhythms from the reduction of blood flow in the coronary arteries. After the marijuana was out of the system, the flow reverted to normal, as well as the heart rhythm. In another case, the slow coronary blood flow due to marijuana usage led to a major heart attack.

The body’s heart rate and blood pressure increase within minutes of using marijuana despite people saying the drug has relaxing effects. Statistically, people who use marijuana are more likely to use other illegal drugs, more likely to smoke, and have a poorer diet, which are all risk factors for heart disease.

One of the more common side effects of marijuana usage reported is an irregular heart beat (atrial fibrillation). Usually, the afib occurred right after inhaling. Often, afib can occur without the person even knowing. Usually, there was no recurrence once the marijuana usage stopped.

In one study, the risk of heart attack increased 5 times the average after one hour after using the drug. Other reports have found this same finding.
It can be hard to target marijuana as the sole reason a person is experiencing heart problems, because often the person is also a smoker or uses other drugs, so to put the blame solely on marijuana would be false. As more studies and reports study marijuana’s relation to heart disease and other heart problems, we will be able to see if there is a correlation, and if marijuana causes harmful side effects to the heart. Despite there not being many studies proving one way or another if the drug’s effect on the heart is bad, it is still good to keep in mind that the drug may have some harmful effects.

If you experience afib or any other issues with your heart, it’s time to get them checked out. If you suffer from heart valve disease and need surgery to repair or replace a valve, it’s time to talk to a heart valve surgeon about your options. Dr. Peter Mikhail is a heart valve surgeon who performs mitral valve surgery, TAVR and mini-AVR. To book a consult, click here or call 727-312-4844. He is based in New Port Richey, Florida, and treats patients in the Tampa and Clearwater areas.


February has just past, and whether you’re in a relationship or not, you may have had your share of Valentine’s Day candies. Who can resist the heart-shaped chocolates in the store? Since you may have consumed an excess amount of chocolate, you may be wondering, “Is chocolate even good for me? And my heart?” The good news: it is! However, you should be eating it in moderation. Too much of anything can be bad for the body.

Chocolate has positive benefits on the body. How? It can help promote better blood flow, lower blood pressure and improve some cardiac conditions. A few years ago, researchers from Boston to Birmingham conducted a trial and found that chocolate helps the heart because of the flavonoids it contains. Studies have showed people with higher weekly consumption of chocolate had the lowest risk for heart disease, but if you replaced that chocolate with candies (non-chocolate) they could actually double their heart disease risk.

Flavonoids are a nutritional subset of polyphenols, which help lower incidences of coronary heart disease and stroke. The highest flavonoid amount is found in dark chocolate.

According to the dean of the Friedman School of Nutrition Science and Policy at Tufts University, polyphenols help to improve the health of the blood vessels.  In one study, people who consumed 16-100 grams of chocolate per day benefitted the most from consumption.

Dark chocolate isn’t the answer to all your heart problems though! Eating chocolate all day will not make you the healthiest person. You still need to consume a heart-healthy diet full of protein, healthy fats, whole grains, fruits, and vegetables.

So, enjoy a piece or two of that left-over Valentine’s candy!

If you have a history of heart disease in your family or currently suffer from heart disease, it’s time to talk to your doctor about the best heart-healthy diet for your specific needs.  If you suffer from heart disease and potentially need surgery, it’s time to talk to a heart valve surgeon. Dr. Peter Mikhail is a heart valve surgeon who specializes in mitral valve surgery and TAVR. To book a consult, click here or call 727-312-4844. He is based in New Port Richey, Florida, and treats patients in the Tampa and Clearwater areas.


Dr. Peter Mikhail is a thoracic and cardiac surgeon in Tampa, Clearwater, and New Port Richey, Florida. Dr. Mikhail is Board Certified by the American Board of Surgery, The American Board of Thoracic Surgery and The Royal College of Physicians and Surgeons of Canada.

Newsletter Sign Up

Copyright by Dr. Peter Mikhail | Site By Damonaz Design, LLC