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Patho
Heart failure & shock
Term | Definition |
---|---|
Preload | The volume the heart chambers has to pump |
Afterload | The resistance the chambers have to push against to eject blood |
Contractility | How forceful the chambers squeeze blood |
Cardiac Output | The volume of blood the heart pumps |
Ejection Fraction (EF) | (%) of blood ejected from the left ventricle (LV) during systole (normal 60-80%) |
Stroke volume (SV) | actual (ML) volume of blood ejected from the LV during systole |
Heart Failure | Inability of the heart to maintain sufficient cardiac output to optimally meet the metabolic demands of tissues and organs |
Left-Sided Heart Failure | Left Ventricular infarction. HTN. Backward and Forward Effects. |
Right sided heart failure | Usually caused by Left-sided HF. May be caused by lung disorders. Congestion of blood BEHIND the failing right ventricle |
Shock | MOMENTARY act in a life threatening situation.When the cell does not have adequate O2 and nutrients, it is unable to metabolic needs |
Cardiogenic: | Type of shock that's is ventricular dysfunction |
Obstructive | Type of shock where the heart is prevented from pumping |
Hypovoemic | Type of shock that is inadequate blood volume |
Distributive | Type of shock that's vasodilation |
Neurogenic Shock | Often transitory. Depression of medulla or spinal cord |
Septic Shock | Common cause of ICU death. Severe Inflammatory reaction. Bacteremia. |