Heart Failure Flashcards
What is heart failure?
complex syndrome
no pump
due to structural and functional changes
HF causes
cardiomyopathy
hypertension
coronary artery disease
oedema associated with HF
peripheral and pulmonary
HF classes 1-4 depend on
symptoms during physical activity
RS HF congestion:
peripheral
LF HS congestion:
pulmonary
aims of HF treatment:
tolerance to exercise
symptom relief
reduce mortality
afterload:
pressure heart works against
preload:
ventricular stretch at the end of diastole
how is cardiac output increased?
reducing afterload
how is gas exchange improved?
reducing preload
Beta Blockers in HF:
inhibit sympathetic activity
reduce dysrhythmia
prevent hypertrophy
3rd gen: vasodilation
1st gen selectivity:
non-selective for B1 and B2
2nd gen selectivity:
B1
3rd gen selectivity:
selective/ non-selective + extra effects