Atrial Fibrillation. Will you Ever Have it?

Atrial Fibrillation is one of the most common arrhythmias of the heart. It is often referred as “irregular heart beat” or “quivering of the heart”¹. It is important because it is related to strokes, heart failure and cognitive decline. Its treatment, in addition to trying to control the arrhythmia, usually involves anticoagulation in order to decrease the risk of stroke.

Even if people are healthy and have few or no cardiovascular risk factors, there is a age-related risk of developing atrial fibrillation. This risk has been measured and it increases progressively with age. In one study, people between 55-59 years old have a 0.7% risk, 60-64 years old 1.7%, 65-69 years old 4.0%, 70-74 years old 6.0%, 75-79 years old, 9.0%, 80-84 years old 13.5% and older than 85 years old 17.8%². The risk seems to be slightly higher in men than in women.

The risk of developing atrial fibrillation increases with the presence of conditions such as hypertension, diabetes mellitus, hyperthyroidism, heart failure, obesity, obstructive sleep apnea, excessive sports practice, chronic inflammatory states, and alcohol abuse³. In addition there are genetic markers that might explain why certain people develop atrial fibrillation at a younger age and why white people are more affected than people from African of Hispanic descent. There are mutations in certain genes that increase the risk and there are genetic variants called single nucleotide polymorphisms (SNP) that are associated with early onset atrial fibrillation.

Like with every condition, there are modifiable risk factors and non-modifiable risk factors (like the genetic ones). If anyone has any of the non-modifiable risk factors, it is better to be on the safer side and make sure that more risk is not added to the already present ones. Also, be in close communication with your personal physician for proper prevention and treatment if needed.

References

1. http://www.heart.org/HEARTORG/Conditions/Arrhythmia/AboutArrhythmia/What-is-Atrial-Fibrillation-AFib-or-AF_UCM_423748_Article.jsp#.V3RKAFeL1M8. Obtained June 20, 2016

2. Jan Heeringa, Deirdre A.M. van der Kuip, Albert Hofman, Jan A. Kors, Gerard van Herpen, Bruno H.Ch. Stricker, Theo Stijnen, Gregory Y.H. Lip3, and Jacqueline C.M. Witteman. European Heart Journal. 2006;27: 949-953

Marco A. Ramos MD

Is Moderate Alcohol Drinking Good for your Cardiovascular Health?

The answer, of course, is more complicated that everyone thinks. For many years, we have been told, (and as a physician I have told people) that drinking alcohol in moderate amounts is good for the cardiovascular health. This is based on  studies that indeed show a decrease in cardiovascular events (heart attacks, strokes and death) in people who drink alcohol moderately compared to non-drinkers or to heavy drinkers. The basis seemed to be an increase in the HDL “good” cholesterol.

Today, with the availability of genetic testing, scientists have been able to identify a subset of people (15-20% of the population) that may get a huge cardiovascular benefit from drinking alcohol moderately. According to one study, they can reduce the risk up to 80%. What this means is that if someone does not belong to this group, drinking alcohol in moderate amounts probably does nothing to the cardiovascular risk.

What are the potential lessons from this information? The first lesson is that Medicine is an evolving science. As knowledge increases, we physicians will be able to practice better and serve patients better. The second lesson is that individualized care is extremely important. Nowadays we tend to look for “fit-for-all” solutions. The reality is that we are all built differently. 

Marco A. Ramos MD