Americans know how prevalent heart disease is — about 1 in 12 of us suffer from it. What we don’t always recognize are the connections heart disease shares with alcohol. On the one hand, researchers have known for centuries that excessive alcohol consumption can damage the heart. Drinking a lot over a long period of time or drinking too much on a single occasion can put your heart—and your life—at risk. On the other hand, researchers now understand that drinking moderate amounts of alcohol can protect the hearts of some people from the risks of coronary artery disease.
Deciding how much, if any, alcohol is right for you can be complicated. To make the best decision for yourself, you need to know the facts and then consult your physician.
KNOW THE FUNCTION:
Your cardiovascular system consists of your heart, blood vessels, and blood. This system works constantly—every second of your life—delivering oxygen and nutrients to your cells, and carrying away carbon dioxide and other unnecessary material.
Your heart drives this process. It is a muscle that contracts and relaxes over and over again, moving the blood along the necessary path. Your heart beats about 100,000 times each day, pumping the equivalent of 2,000 gallons of blood throughout your body.
The two sides, or chambers, of the heart receive blood and pump it back into the body. The right ventricle of the heart pumps blood into the lungs to exchange carbon dioxide from the cells for oxygen. The heart relaxes to allow this blood back into its left chamber. It then pumps the oxygen-rich blood to tissues and organs. Blood passing through the kidneys allows the body to get rid of waste products. Electrical signals keep the heart pumping continuously and at the appropriate rate to propel this routine.
KNOW THE RISKS :
Long-term heavy drinking weakens the heart muscle, causing a condition called alcoholic cardiomyopathy. A weakened heart droops and stretches and cannot contract effectively. As a result, it cannot pump enough blood to sufficiently nourish the organs. In some cases, this blood flow shortage causes severe damage to organs and tissues. Symptoms of cardiomyopathy include shortness of breath and other breathing difficulties, fatigue, swollen legs and feet, and irregular heartbeat. It can even lead to heart failure.
Both binge drinking and long-term drinking can affect how quickly a heart beats.The heart depends on an internal pacemaker system to keep it pumping consistently and at the right speed. Alcohol disturbs this pacemaker system and causes the heart to beat too rapidly, or irregularly. These heart rate abnormalities are called arrhythmias. Two types of alcohol induced arrhythmias are:
ATRIAL FIBRILLATION – In this form of arrhythmia, the heart’s upper, or atrial, chambers shudder weakly but do not contract. Blood can collect and even clot in these upper chambers. If a blood clot travels from the heart to the brain, a stroke can occur; if it travels to other organs such as the lungs, an embolism, or blood vessel blockage, occurs.
VENTRICULAR TACHYCARDIA – This form of arrhythmia occurs in the heart’s lower, or ventricular, chambers. Electrical signals travel throughout the heart’s muscles, triggering contractions that keep blood flowing at the right pace. Alcohol-induced damage to heart muscle cells can cause these electrical impulses to circle through the ventricle too many times, causing too many contractions. The heart beats too quickly, and so does not fill up with enough blood between each beat. As a result, the rest of the body does not get enough blood. Ventricular tachycardia causes dizziness, lightheadedness, unconsciousness, cardiac arrest, and even sudden death. Drinking to excess on a particular occasion, especially when you generally don’t drink, can trigger either of these irregularities. In these cases, the problem is nicknamed “holiday heart syndrome,” because people who don’t usually drink may consume too much alcohol at parties during the holiday season. Over the long-term, chronic drinking changes the course of electrical impulses that drive the heart’s beating, which creates arrhythmia.