5 star topics Flashcards
Valves open during systole
Aortic, pulmonic
Valvular lesions producing systolic murmurs
MR, TR, AS, PS, Mitral valve prolapse
Valves open during diastole
mitral, tricuspid
Valvular lesions producing diastolic murmurs
MS, TS, AR, PR
Murmurs and sounds heard best with patient in left lateral decubitus position
Mitral murmurs
Left sided S3, S4 heart sounds
Cardiac auscultation findings considered benign when there is no evidence of disease
Split S1
Split S2 on inspiration
S3 under 40 yo
early, quiet systolic M
Causes of aortic stenosis
Congenital bicuspid valve - about 40 yo
Senile calcifications - over 60 yo
Rheumatic heart disease
Tertiary syphilis - aortitis (tree barking of aorta and dilation of aortic root -> AS, AR, dissection)
Presentation of aortic stenosis
Dyspnea (CHF)
Syncope
Angina
-all with exertion
Physical exam findings with aortic stenosis
Ejection click
Systolic ejection murmur “crescendo-decrescendo” heard at RUSB
Murmur radiates to neck/carotids
Valsalva will decrease the murmur
Peripheral pulses are weak and prolonged/delayed “pulsus parvus et tardus”
Next step: ECHO
Treatment of aortic stenosis
aortic valve replacement if symptomatic
Causes of Mitral regurgitation
MV prolapse Rhematic heart disease infective endocarditis papillary muscle rupture LV dilation (from ischemic heart disease or dilated cardiomyopathy)
Presentation of MR
often asx
Fatigue
Exertional dyspnea
A fib with LA dilation
Physical exam findings of MR
holosystolic murmur heard at apex, may radiate to axilla
Next step ECHO
Treatment of MR
Vasodilators for LV dysfunction
Anticoagulate patients with Afib or hx of rheumatic heart disease
Mitral valve repair
Mitral valve prolapse
Large billowy leaflets into atrium
Midsystolic click with late systolic crescendo murmur
Causes of aortic regurgitation
Infective endocarditis
Rheumatic heart disease
Tertiary syphilis - aortitis (tree barking of aorta and dilation of aortic root -> AS, AR, dissection)
Presentation of Aortic regurgitation
usually asx until severe
Dyspnea, heart failure
Physical exam findings of aortic regurgitation
Wide pulse pressure - normal SBP, DBP way off
Bounding pulses
de Musset sign - rhythmic bobbing of head
Rumbling, early diastolic murmur heard at RUSB or Left side of sternum
Treatment of aortic regurgitation
Medical management of HF - ACE-i, Bb, spironolactone
Aortic valve replacement
Causes of mitral stenosis
Mainly rheumatic heart disease
Presentation of mitral stenosis
Dyspnea and CHF - may be exacerbated by pregnancy 2/2 expended blood volume, increased HR and SV -> increased CO
Afib d/t dilation of LA
Most patients have concomitant mitral and/or tricuspid regurgitation
Physical exam findings of mitral stenosis
Opening snap after S2
Rumbling, late diastolic murmur at apex
Treatment of mitral stenosis
Balloon valvuloplasty
diruetics for CHF sxs prior to valvulopasty
Anticoagulation pts with Afib
Presentation of shock
Hypotension \+/- tachycardia \+/- cool, clammy, cyanotic skin Decreased urine output - monitor closely AMS - monitor closely Metabolic acidosis - d/t anaerobic metabolism - check lactic acid level and BMP for anion gap
Mechanisms, causes, and treatment for Hypovolemic shock
Mech: decreased intravascular volume
Cause: hemorrhage - trauma, GI bleed; burns; GI losses - prolonged V/D
Tx: IVF, blood transfusion, tx underlying cause
Mechanisms, causes, and treatment for Cardiogenic shock
Mech: pump failure
Cause: acute MI, dilated CM, arrhythmia, ruptured septum, papillary muscle rupture
Tx: Dobutamine (beta 1 effect); intra-aortic balloon pump
Caution IVF can lead to pulmonary edema
Mechanisms, causes, and treatment for Obstructive shock
Mech: Extracardiac causes of pump failure; decreased venous return and decreased preload
Cause: Tension PTX -> decreased preload; hemothorax; PE; cardiac tamponade
Tx: Tx underlying cause; pericardiocentesis for tamponade; chest tube for PTX
Mechanisms, causes, and treatment for Septic shock
Mech: peripheral VASODILATION due to infection
Cause: infection
Tx: IVF, NE if IVF fails, Abx
Mechanisms, causes, and treatment for Anaphylactic shock
Mech: peripheral VASODILATION due to severe type 1 hypersensitivity reaction
Cause: allergic reaction
Tx: Epi - vasoconstrict, increase CO = increased BP, airway dilation; IVF; airway management - O2, ET; diphenhydramine, H2 blocker
Mechanisms, causes, and treatment for Neurogenic shock
Mech: peripheral VASODILATION and BRADYCARDIA due to autonomic dysregulation
Cause: CNS injury
Tx: IVF, vasopressors, atropine for brady
Hemodynamics (MAP, SVR, HR, PCWP, PCWP after fluid challenge) for hypovolemic shock
MAP - low - hypotension
SVR - increased
HR - increased
PCWP - low
PCWP after fluid challenge: unchanged or increased
Hemodynamics (MAP, SVR, HR, PCWP, PCWP after fluid challenge) for cardiogenic shock
MAP - low - hypotension
SVR - increased
HR - variable
PCWP - increased
PCWP after fluid challenge: higher, not volume issue
Hemodynamics (MAP, SVR, HR, PCWP, PCWP after fluid challenge) for Obstructive shock d/t lung cause (tension PTX, hemothorax, PE)
MAP - low - hypotension
SVR - increased
HR - increased
PCWP - low or normal
PCWP after fluid challenge: unchanged or increased
Hemodynamics (MAP, SVR, HR, PCWP, PCWP after fluid challenge) for Obstructive shock d/t cardiac tamponade
MAP - low - hypotension
SVR - increased
HR - increased
PCWP - increased
PCWP after fluid challenge: increased
Hemodynamics (MAP, SVR, HR, PCWP, PCWP after fluid challenge) for Septic shock
MAP - low - hypotension
SVR - low - vasodilation
HR - increased
PCWP - normal
PCWP after fluid challenge: increased
Hemodynamics (MAP, SVR, HR, PCWP, PCWP after fluid challenge) for Anaphylactic shock
MAP - low - hypotension
SVR - low - vasodilation
HR - increased
PCWP - normal
PCWP after fluid challenge: increased
Hemodynamics (MAP, SVR, HR, PCWP, PCWP after fluid challenge) for Neurogenic shock
MAP - low - hypotension
SVR - low - vasodilation
HR - increased
PCWP - normal
PCWP after fluid challenge: increased
Normal PR interval
conduction delay through AV node
less than 1 large box (200 ms)
P wave
atrial depolarization
QRS
ventricular depolarization
normal 3 small boxes - less than 120 ms = narrow
ST segment
ventricles depolarized
T wave
Ventricular repolarization
Peaked - hyperkalemia
flat - hypokalemia