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Heart Disease (otherwise known as Cardiovascular Disease) is a broad term which describes a group of heart-related conditions.
The most common types of heart disease include Coronary Heart Disease, Coronary Artery Spasm, Coronary Slow Flow Phenomenon, Tako-tsubo Cardiomyopathy, Heart Attack, Heart Failure, Valvular Heart Disease and Arrhythmias. These common types are described below in more detail:
Coronary Heart Disease otherwise known as Coronary Artery Disease (CAD) is the most common type of heart disease. CAD is a result of plaque build-up in the coronary arteries which leads to blockages. The arteries become narrow and rigid, restricting blood flow to the heart. The heart becomes starved of oxygen and the vital nutrients it needs to pump properly. Over time, CAD can also weaken the heart muscle and contribute to heart failure and arrhythmias.
A heart attack, or myocardial infarction (MI), is when permanent damage to the heart muscle is caused. For a healthy heart, a consistent oxygen-rich flow of blood is required. This blood supply is provided by the coronary arteries and in people with coronary artery disease these arteries are narrowed due to a build-up of fatty matter known as plaque, meaning the blood supply to the heart is limited.
When the build-up of plaque breaks down, blood cells stick to the damaged area and cause a blood clot. If a blood clot totally blocks the artery, the heart muscle becomes “starved” of oxygen. Within a short time, death of heart muscle cells occurs, causing permanent damage.
Coronary Artery Spasm (CAS) is a temporary discomfort or pain that is caused by a temporary spasm (constriction) in one or more of the coronary arteries (the arteries that supply oxygen and nutrients to your heart). It is sometimes called ‘Prinzmetal angina’ and usually happens in people aged 50 years or younger.
Spasms can range from very minor to severe, and sometimes can completely block the coronary artery. Severe CAS which lasts for more than 15 minutes can permanently damage the heart muscle and can lead to a heart attack.
Coronary Microvascular Disease (CMD) affects the small vessels of the heart. One common type of CMD is Coronary Slow Flow Phenomenon (CSFP). Patients with CSFP have dysfunctional microscopic blood vessels causing blood to flow slower through their major heart vessels, producing recurring chest pain. The condition is extremely debilitating and has a severe impact on sufferer’s quality of life.
Tako-tsubo or “broken heart” syndrome as it is more widely known is a potentially fatal heart condition that is often diagnosed in women who’ve had a sudden emotional shock or prolonged stress. Tako-tsubo cardiomyopathy is a weakening of the left ventricle, the heart’s main pumping chamber and the exact cause of the condition is not known.
Heart Failure occurs when the heart does not pump enough blood to satisfy the needs of the body. The term ‘Heart Failure’ doesn’t necessarily mean that the heart has stopped working or is about to, just that it is not performing as well as it should.
A weakly pumping heart may be due to previous heart attacks, longstanding high blood pressure, or heart muscle abnormalities – referred to as cardiomyopathies.
Valvular heart disease occurs when the heart valves do not work the way they should.
The heart valves exist at the exit of each of the four heart chambers and maintain one-way blood flow through the heart. The four heart valves make sure that blood always flows freely in a forward direction and that there is no backward leakage.
There are different types of heart valve disease:
Irregular heart rhythm — arrhythmia — is when your heart doesn’t keep up a good beat. An irregular heartbeat is not the same as an irregular heart rate. A heartbeat that is too fast is called tachycardia. A heartbeat that is too slow is called bradycardia.
Arrhythmias may be caused by many different factors, including:
Irregular heart rhythms can also occur in otherwise normal, healthy hearts.
Atrial Fibrillation is the most common sort of arrhythmic disorder where the heart doesn’t beat normally. In people with atrial fibrillation the upper chambers of the heart will randomly begin to contract in a chaotic and irregular rhythm. Along with causing palpitations, fainting and chest pain, patients with atrial fibrillation are at an increased risk of experiencing a life-threatening stroke.
Heart disease remains the largest single cause of death in Australia, and accounts for 34% of male and 39% of female deaths. There are a number of conditions which increase the risk of heart disease such as diabetes, anxiety and depression as well as lifestyle risk factors including high blood pressure, high cholesterol, high body mass index, physical inactivity, smoking, alcohol and low fruit and vegetable intake.
By being aware of the risk factors for heart disease and choosing to lead a fit and healthy lifestyle, you can reduce your risk of heart disease dramatically.