Shared Flashcard Set

Details

Cardio 1
Cardio First Aid 2012
19
Medical
Professional
06/05/2013

Additional Medical Flashcards

 


 

Cards

Term
SA and AV nodes are supplied by ___
Definition
Right coronary artery
Term
What artery supplies the inferior portion of the left ventricle 80% of the time and via what branch?
Definition
Right coronary artery via the Posterior Descending
Term
Enlargement of what part of the heart can cause dysphagia?
Definition
left atrium
Term

CO=

(equation using stroke volume)

Definition
(stroke volume)x(heart rate)
Term

CO=

(equation using O2 consumption)

Definition
(rate of O2 consumption)/ (arterial O2 content - venous O2 content)
Term

Mean arterial pressure=

(equation using diastolic and systolic pressures)

Definition
2/3 diastolic pressure + 1/3 systolic pressure
Term

pulse pressure=

(equation)

Definition

systolic pressure- diastolic pressure

(is equivalent to stroke volume)

Term
4 Things that increase cardiac contractility
Definition

1. Catecholamines (increase activity of calcium pump in SR)

2. increase intracellular calcium

3. decrease extracellular sodium (decrease Na+/Ca2+ exchanger)

4. Digitalis (increase intracellular sodium)

Term
5 things that decrease cardiac contractility
Definition

1. β1 blockade (decreases cAMP)

2. Heart failure

3. Acidosis

4. Hypoxia/hypercapnea

5. Ca2+ channel blockers

Term
Name a venodilator and its affect on the heart
Definition

Nitroglycerine

Decreases preload

Term
Name a vasodilator and its affect on the heart
Definition

Hydralazine

Decreases afterload

Term

Ejection fraction=

(equation)

Definition
(EDV-ESV)/EDV
Term
What is a normal ejection fraction?
Definition
>55%
Term
What accounts for most of peripheral resistance?
Definition
arterioles
Term
S1=
Definition

mitral and tricuspid valve closure

(beginning of systole)

Term
S2=
Definition

Aortic and pulmonary valve closure

(beginning of diastole)

Term
S3=
Definition
In early diastole (right after S2) from increased filling pressures (assoc. with dilated ventricles)
Term
S4=
Definition
In late diastole (right before S1)- atrial kick, assoc. with ventricular hypertrophy/ stiff left ventricle
Term
What is normal S2 splitting?
Definition
Aortic valve closes before pulmonic, inspiration increases this difference (decreased intrathoracic pressure sucks blood into lungs and sends less to left heart)
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