CHF Flashcards
heart failure mostly caused by
fluid backing up into lungs–>pulmonary edema/congestion
LV failure: systolic or diastolic
symptoms due to ??
management ??
what is the EF? (not CO, can have EF of 10% or 70% in HF)
Symptoms due to low CO and congestion, including dyspnea
Optimal management includes: ACE-I/ARB, BB, aldosterone inhibitors
RV failure
most likely due to LV failure
primary RV failure: cor pulmonale
Peripheral congestion, acites, edema
Hi-output failure
beri beri: vit def (thiamine)
hyperthyroid
Causes of systolic CHF
Ischemic cardiomyopathy (HA caused dead heart muscle) HTN (stiffness inc. as afterload inc.) hypo/hyperthyroid HIV ETOH viral dilated cardiotoxins (herceptin, adriamycin?, doxirubicin) infectious (Chagas) hemochromatosis sarcoid (both) amyloid (both) valvular tachycardia-mediated peri-partum
*important to know bc some causes are reversible
Systolic/Diastolic CHF
50/50
originally though HF was just systolic
Causes of diastolic CHF
*HTN*-hypertrophic (dilated and burned out) restrictive (amyloidosis) DM pericardial disease aging
Neurohormonal activation
Partially responsible for the mechanical changes in HF
Vasopressin (ADH) secretion – promotes water absorption by the kidney
(RAAA): Renin-angiotensin-aldosterone axis: maintains cardiac output (CO) and tissue perfusion
*now use B-blockers, used to be contraindicated
RAAA does what ??
stimulates arterial vasoconstriction with angII
expands intravascular volume with Na+ and water retention
important pressure to know
LVEDP: left ventr. end diastolic pressure
(preload)
dry or wet?
use surrogate endpoints
if too high will have backup into lungs
about equal to LA pressure (and wedge pressure, same as pulmonary artery diastolic pressure), and further back….jugular pulsations (JVP)
dec. CO
inc. SNS–>inc HR, contractility, vasoconstriction–>raise BP–>inc. CO
inc. RAAS–>vasoconstr, inc. circ volume–>inc. venous return (preload)–>inc. CO
inc. ADH–>inc. circ volume–>inc. venous return (preload)–>inc. CO
CHF classification
Stages A-D (Duke staging)
A: predisposed (poorly controlled HTN)
B: have LVEDP elev. (EF (more in recording)
Signs/Symptoms/Physical Exam/labs
Palpation: diffuse PMI may imply cardiomyopathy
S3/S4: (S3 systolic dysfunction, S4 diastolic dysfunction)
murmurs: mitral regurg-functional MR
HJR: press on liver area, see inc. in JP (hep jug reflex)
JVP
edema
BNP: heart damage from inc. LV wall stress, release naturitic peptide (NP) from atrium helps with diuresis
Assessment of LV function
Echo easiest, no radiation
MUGA (chemo pts) best way to grade EF, but don’t do much
angiogram
Pressure-Volume Loops
Frank-Starling curve
preload vs. CO
*lasix will reduce preload