There is an underappreciated risk of poor outcome in heart failure patients discharged with ongoing congestion and WRF (2/9).
Pivotal paper of @MarcoMetraahajournals.org/doi/10.1161/ci…
Appropriate and thorough decongestion is class I recommendation in HFA-ESC guidelines so DON'T stop decongestive efforts during WRF (3/9). academic.oup.com/eurheartj/arti…
Clinical scenario 1 = assess diuretic response -> if OK: continue similar decongestive efforts (=pseudo-WRF) (4/9).
Clinical scenario 2 = assess diuretic response -> if poor -> assess CVP + TTE + measure intra-abdominal pressure (IAP) -> consider paracentesis if IAP ↑ secondary to ascites (5/9)
Clinical scenario 3: check for hypoperfusion (which is extremely rare) -> if hypoperfusion: consider mechanical circulatory support or inotropic agents to optimize hemodynamic status (6/9).
Clinical scenario 4: check for hypoperfusion -> if no hypoperfusion: increase diuretic intensity and consider IV vasodilators (7/9).
In parallel: continue and even upitrate neurohumoral blockers as diuretic efficacy is increased despite lower blood pressure and WRF, however caution if serum creatinine increase is too high (8/9) ahajournals.org/doi/10.1161/CI…
Door to ‘diuretic’ time: earlier administration of loop diuretics is associated with improved outcomes independent of HF severity (2/9). jacc.org/doi/abs/10.101…
The first dose of the loop diuretic should be 40 mg furosemide (=1 mg bumetanide) in diuretic naïve and twice the home dose in patients on loop diuretic (3/9).
2/10. The kidney is a remarkable vascular organ. Renal blood flow = 1000 ml/min, renal plasma flow = 600 ml/min.
3/10. Elevated central venous pressure affects renal function significantly more than reduced cardiac output in heart failure. jacc.org/doi/10.1016/j.…
Glomerulus: renal blood flow ↓ in HF, but the kidney tries to maintain GFR by afferent arteriolar vasodilation and efferent arteriolar vasoconstriction. This leads to single-nephron hyperfiltration initially preserving total GFR, but further damaging the glomerulus. (2/6)
Proximal tubules: hyperfiltration leads to ↑ water and solutes filtered, but ↓ remaining in the peritubular capillaries. Due to ↑ peritubular capillary oncotic pressure + ↑ renal lymph flow -> ↑ water and Na+ reabsorption in the proximal tubules (3/6)