Chronic Heart Failure Flashcards
Primary Causes Heart Failure
Failure of heart muscle or Failure of heart valves
Heart Failure Definition
Failure of the heart as a pump to meet the circulatory needs
Types Heart Failure
Acute - Post MI Chronic
Secondary/ Principle causes heart failure (3)
HYPERTENSION - Hypertrophy increasing cardiac work IHD - Impaired muscle function CARDIOMYOPATHIES - Alcohol, viral
Heart Failure Precipitants (4)
Pregnancy Anaemia Hyper/ hypo- thyroidism Fluid retaining drugs e.g. Glucocorticoids; NSAIDs
Heart Failure, neurohormonal adaptation - events (4)
Activation SNS Activation RAAS Activation ADH Activation ANP (atrial natriuretic peptide - promote sodium loss)
Heart failure, neurohormonal adaptation - consequences (5)
Increased after load Increased circulating volume (increased preload and after load) Increased resistance - will lead to impaired renal function, more salt/ water retention with further activation of RAAS Neurohormonal adaptation –> myocyte dysfunction Vicious circle –> further impairs pump activity of the heart
LEFT-SIDED FAILURE - Secondary cause & Consequence
Often secondary to hypertension Left ventricle impaired/ poor output leads to increase in ATRIAL/ PULMONARY VENOUS pressure with PULMONARY OEDEMA
RIGHT-SIDED FAILURE - Causes (2)
Right ventricular output fails Due to Lung disease (cor pulmonale) Pulmonary valvular stenosis (valve between RV & Pulmonary aa)
BIVENTRICULAR FAILURE - Causes (2)
Both chambers affected Disease (e.g. IHD) has affected both ventricles LV failure leads to pulmonary congestion, which may lead to RV failure
Heart Failure - Signs & Symptoms (6)
Fatigue, listless Poor exercise tolerance (determines grade) Cold peripheries Low blood pressure? Reduced urine flow Weight loss
LVF Signs and Symptoms
PULMONARY OEDEMA Dyspnoea - with a sensation of drowning (‘cardiac asthma’) Cough? Orthopnoea - breathlessness lying, relieved by sitting up (nocturnal?) Inspiratory crepitations on auscultation
RVF Signs and Symptoms
Raised venous pressure Increased JVP Enlarged liver Oedema - ankles; if lying flat rises to thighs/ abdomen
Heart failure Diagnosis
Symptoms & Examination Confirmed by echocardiogram –> ejection fraction s lines (lines possibly due to lympathetic distension)
AF Cause
LV/ Valve failure leading to increased pressure in the left atrium leading to distension which ends of atrial fibrillation