Heart failure happens when your heart muscles become too weak or stiff to pump blood effectively. It doesn’t mean your heart will stop, just that it isn’t working as well as it should. The lower chambers of the heart (the ventricles) aren’t contracting at the same time; the left side of the heart is out of sync with the right side. Cardiac Resynchronization Therapy (CRT) can be used to regulate heart rhythms with a pacemaker function (CRT-P) or a defibrillator function (CRT-D) to provide shocks as needed to prevent sudden cardiac death.
Fast and irregular impulses start in the ventricles instead of the atria, which interferes with the heart’s ability to pump blood.
Cardiomyopathy is when the heart muscle becomes thick, enlarged, or rigid. When the heart is too weak to pump efficiently, it can lead to heart failure or arrhythmia.
Heart failure can also be the result of problems in the atrioventricular (AV) node where the electrical impulses travel before being sent to the lower chambers of the heart. There are three levels of "heart block" or "AV block": first-, second-, and third-degree.
An irregular heart rhythm that begins in the upper chambers of the heart. Afib is very fast, chaotic atrial rhythm.
The electrical impulses that make the heart beat are interrupted in the right or left bundle branches of the heart. This can delay or block the path of the electrical impulses that are needed for a regular heart rhythm.
This measures the strength of your heart’s contractions. A normal heart ejection fraction (EF) is 55-65%. If you have an EF of less than 40%, this could mean you are experiencing heart failure to some degree. An EF of less than 35% is potentially life threatening. When the left ventricle is affected, it is called left ventricle ejection fraction or LVEF.
Also called systolic left ventricular dysfunction, this means the left ventricle isn’t squeezing hard enough to pump a sufficient amount of blood throughout your body.
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