CVS Flashcards
Young Liver Synthesizes Blood
Yolk sac (3-8wks)
Liver (6wks-birth)
Spleen (10-28wks)
Bone marrow (18wks-adult)
SA and AV node supplied by what blood vessel
RCA
CO=
SV x HR
Fick principle
CO=
Rate of O2 consumption / (arterial O2 content - venous O2 content)
MAP=
CO x TPR
2/3 DP + 1/3 SP
SV=
EDV-ESV
SV affected by CAP
- Contractility
- Afterload
- Preload
Contractility (and SV) increased with (4)
- Catecholamines: increasing Ca pump activity
- Increase intracellular Ca
- Decrease extracellular Na
- Digitalis
Contractility (and SV) decreased with (5)
- β-blockers
- HF and systolic dysfunction
- Acidosis
- Hypoxia/hypercapnea
- Ca channel blockers
What decreases preload
Venodilators (Nitroglycerin)
What decreases afterload
Vasodilators (Hydralazine)
Ejection Fraction (EF)=
SV/EDV
Aortic area systolic murmur is due to
Aortic stenosis
Flow murmur
Aortic Valve sclerosis
Pulmonic area systolic ejection murmur heard in
Pulmonic stenosis
Flow murmur
Tricuspid area pansystolic murmur heard in
Tricuspid regurgitation
Ventricular spetal defect
Tricuspid area diastolic murmur heard in
Tricuspid stenosis
ASD
Hand grip (increased vascular resistance) increases intensity of all murmurs excpet
ASD
Hypertrophic cardiomyopathy
P wave represents
Atrial depolarization
PR interval represents
Conduction delay through AV node
QRS complex represents
Ventricular depolarization
QT interval represents
Mechanical contraction of the ventricles
T wave represents
Ventricular repolarizatioin
ST segment represents
Isoelectric, ventricles depolarized
U wave represents
Caused by hypokalemia and bradycardia
Some Risky Meds Can Prolong QT
- Sotalol
- Risperdone
- Macrolides
- Chloroquine
- Protease inhibitors (-navir)
- Quinidine
- Thiazides
Romano-Ward syndrome is
AD congenital long QT syndrome
Pure cardiac
Jervell and Lange-Nielsen syndrome
AR congenital long QT syndrome
Sensorineural deafness
What causes 3rd degree (complete) heart block
Lyme disease
Vagus N in aortic arch responds to
Only increase BP
Glossopharyngeal N in Carotid sinus responds to
Increase and decease in BP
Hypotension sequence on Baroreceptors
- Decrease in arterial P causes decrease in stretch leading to decrease afferent baroreceptor firing
- Leads to increase efferent sympathetic firing and decrease efferent parasympathetic stimulation
- Leads to:
- Vasoconstriction
- Increase HR
- Increase contractility
- Increase BP
Carotid massage affecet on Baroreceptor
- Increase P on carotid sinus causes increase stretch leading to increase baroreceptor firing
- Increases AV node refractory period and decrease HR
Transposition of great vessels seen in
Infants of Diabetic mothers
Tetralogy of Fallot PROVe
- Pulmonary infundibular stenosis
- RVH
- Overriding aorta
- VSD
Infantile type Coarctation of the aorta associated with
Turner syndrome
MC locations of Atherosclerosis
- Abdominal aorta
- Coronary A.
- Popliteal A
- Carotid A
Thoracic aortic aneurysm associated with
HT
Marfan
3o syphilis
Leads V1-V4 with Q wave means infarct in
Anterior wall (LAD)
Leads V1-V2 with Q wave means Infarct in
Anteroseptal (LAD)
Leads V4-V6 with Q wave means infarct in
Anterolateral (LAD or LCX)
Leads I and aVL with Q waves means infarct in
Lateral wall (LCX)
Leads 2, 3 and avF with Q wave means infarct in
Inferior wall (RCA)
ABCCCD of Dilated Cardiomyopathy
- Alcohol abuse
- Beriberi
- Coxsackie B
- Cocaine
- Chagas
- Doxorubicin
Endocardial fibroelastosis is
Restrictive cardiomyopathy with thick fibroelastic tissue in young children