Disorder of the rate and rythm of the heart caused by a disturbance in the conduction system.
Define heart failure.
results from the hearts inability to increase the CO sufficiently to meet the body's metabolic need.
Define ejection fraction and what is a normal value?
Ability of the heart to function as a pump.
the ratio of the volume of blood the heart empties during systole to the volume of blood in the heart at the end of diastole expressed as a percentage usually between 50 and 80 percent
What are the 4 categories of causes of HF?
1. Alterations in contractility
2. Alterations in preload
3. Alterations in aferload
4. Alterations in the ratio of oxygen supply to oxygen demand