Final Flashcards
(142 cards)
How many beats does your heart beat per year? Lifetime?
40 million, 2.5 billion beats
What is the # 1 cause of death in the U.S. ?
Heart disease
What is the most common cause of heart failure?
Contractile failure (systolic dysfunction/ pump failure)
What is the most common cause of CHF?
Decreased cardiac output
Increased tissue demands is symptom of heart failure due to what?
Hyperthyroidism, severe anemia, AV fistula. (High output failure)
What is a very common sign of congestive heart failure?
Pitting edema
What is the cause of systolic dysfunction heart failure?
Weak contraction, CAD, systemic HTN, Shock (decreased pH)
What is the cause of diastolic dysfunction heart failure?
Failed relaxation which leads to decreased filling.
What are causes of diastolic dysfunction via failed relaxation?
Myocardial fibrosis/amyloidosis, left sided hypertrophy, pericardial tamponade
What is the cause of valvular heart failure ?
Failure to effectively seal
What are causes of valvular dysfunction due to failure to seal?
Stenosis, endocarditis, virus, SLE, rheumatic fever
What is the cause of forward heart failure?
Insufficient output (hypoxia)
What is the cause of backward heart failure?
Venous congestion (increase in venous blood volume/pressure)
what type of heart failure is almost always accompanied by what?
Forward failure, backward failure
What is the frank starling mechanism?
Increase stretch causing a stronger contraction
What is the befit of the frank Starling mechanism?
Increased output
What is the cost of the frank starling method?
Increased 02 and increased tension
Structural changes of the heart are due to what?
Cardiac hypertrophy (cost is increased o2 consumption)
Hypertrophy associated with the heart is due to what?
Increased pressure
What is the association of dilation of the heat?
Increased volume
What is another name of physiological cardiac hypertrophy?
Athletes heart
What is pathological hypertrophy called?
Concentric hypertrophy
What are the cause of Concentric hypertrophy ?
Increase pressure (via HTN, valvular stenosis)
What is another name for physiologic hypertrophy?
Eccentric Hypertrophy