Congestive heart failure and cardiac<unk>  are not interchangeable definitions. Whereas heart failure is a clinical definition that illustrates the occurrence of symptoms of fatigue, dyspnea, and fluid overload; cardiac<unk>  is a mechanical definition that includes abnormalities in heart contraction (called systolic<unk>  or abnormalities in heart relaxation and filling (called<unk>  or both.
Therefore,<unk>  refers to a mechanical<unk>  of the heart during the<unk>  phase of the cardiac cycle in the presence or absence of any clinical symptoms. When clinical symptoms are present on top of the mechanical<unk>  of the heart, the condition is called<unk>  heart failure.
Diastole is the phase of the cardiac cycle when the heart ( i.e. ventricle) is not contracting but is actually relaxed and filling with blood that is being returned to it, either from the body (into right ventricle) or from the lungs ( into left ventricle). The mechanical abnormality in<unk>  is characterized by a decrease in the ventricular filling in the context of an elevated left ventricular end<unk>  pressure and a normal ejection fraction.Diastolic<unk>  is caused by decrease cardiac muscle relaxation or increased stiffness. The ejection fraction of the heart is preserved in this type of<unk> .Systolic and<unk>  commonly occur in conjunction with each other.
Diastolic dysfunction
Systolic dysfunction
Cardiac fibrosis
Ventricular remodeling
Ventricular remodeling pathophysiology
Digoxin effect
Ventricular hypertrophy
Negative inotropy