Heart failure is an impairment of heart contraction or relaxation.
Impairment of heart contraction (systolic dysfunction)
There are multiple possible causes
1. Idiopathic cardiomyopathy
2. Ischaemic heart disease (i.e. severe coronary blockages)
3. Advanced valvular heart disease
3. Excess Alcohol
4. Abnormal heart rhythm
There are multiple medications now available to treat systolic dysfunction.