Understanding Heart Disease
The Structure and Function of a Healthy Heart
To grasp the disease process associated with heart disease, it is essential to examine the structure and functionality of a healthy heart. The heart is divided into left and right sides by a muscular band known as the septum. Each side consists of two chambers: an atrium and a ventricle, separated by a valve. These chambers are responsible for collecting blood, while the valves ensure it flows in the correct direction. The heart muscle contracts to pump blood throughout the body.
Three Key Systems of Heart Function
The operation of the heart can be understood through three primary systems: the pumping system, the electrical system, and the plumbing system.
The Pumping System
The heart functions as a muscle that circulates blood throughout the body via blood vessels. The myocardium is the heart’s middle layer, playing a crucial role in this process. Arteries transport oxygen-rich blood away from the heart, while veins carry oxygen-poor blood back. Capillaries, the tiny vessels, connect arteries to veins. Conditions related to the pumping system include heart failure and cardiomyopathy.
The Electrical System
The heart’s pumping action is regulated by an electrical conduction system that coordinates the contraction of its chambers. Electrical impulses trigger the atria (the upper chambers) to contract slightly before the ventricles (the lower chambers), allowing blood to flow into the ventricles prior to their contraction. This electrical system is vital for maintaining a normal heart rhythm. Conditions affecting the electrical system include atrial fibrillation and heart block.
The Plumbing System
Like all muscles, the heart requires a sufficient blood supply to function effectively. The coronary arteries, which cover the heart’s surface, deliver oxygenated blood to the heart muscle. Conditions that impact the plumbing system include atherosclerosis and high cholesterol.
Cardiovascular Disease Overview
Cardiovascular disease encompasses all disorders affecting the heart and circulation and can impact any of the systems mentioned above. It remains one of the leading causes of death and disability in Ireland and globally.
Additional Resources
For more information on heart disease, explore our upcoming complimentary education sessions or book a consultation to learn more about our services.