Reduced Cardiac Output Starts the Cycle
A weakened heart pumps less blood forward with each contraction.
- ↓: Ejection fraction (Placeholder metric)
- ↓: Stroke volume (Placeholder metric)
- ↑: Neurohormonal activation (RAAS/SNS placeholder)
- ↑: Venous congestion (Placeholder metric)
Failing pump reduces forward flow
Placeholder: reduced contractility lowers cardiac output.
Placeholder callout: low output triggers compensatory neurohormonal activation.
Decreased Renal Perfusion Follows Low Output
Less forward flow means less blood reaching the kidneys.
- ↓: Renal blood flow (Placeholder metric)
- ↓: Perfusion pressure (Placeholder metric)
- ↑: Renal vasoconstriction (Placeholder metric)
- ↑: Venous renal congestion (Placeholder metric)
Forward and backward flow both hurt kidneys
Placeholder: low arterial flow plus venous congestion reduce perfusion.
Placeholder callout: both low-flow and congestive mechanisms matter.
Renal Dysfunction — Rising Creatinine
Reduced perfusion injures nephrons and filtration declines.
- ↑: Creatinine (Placeholder metric)
- ↓: eGFR (Placeholder metric)
- ↑: Sodium retention (Placeholder metric)
- ↑: Uremic toxin buildup (Placeholder metric)
Nephron injury reduces filtration capacity
Placeholder: sustained hypoperfusion causes tubular and glomerular injury.
Placeholder callout: rising creatinine signals worsening cardiorenal interaction.
Diuretic Resistance Complicates Treatment
Poor renal function blunts diuretic delivery and effect.
- ↓: Diuretic delivery (Placeholder metric)
- ↓: Natriuretic response (Placeholder metric)
- ↑: Loop diuretic dose needed (Placeholder metric)
- ↑: Rebound sodium retention (Placeholder metric)
Reduced GFR limits diuretic action at the tubule
Placeholder: less drug reaches its site of action in the nephron.
Placeholder callout: escalating doses may worsen renal injury further.
Vicious Cycle and the Management Balance
Fluid overload strains the heart, closing the loop between organs.
- ↑: Fluid overload (Placeholder metric)
- ↑: Cardiac preload/afterload (Placeholder metric)
- context: Ultrafiltration use (Placeholder metric)
- ↑: Combined organ risk (Placeholder metric)
Balancing decongestion against renal perfusion
Placeholder: therapy must weigh diuresis benefit against renal strain.
Placeholder callout: management requires balancing both organs simultaneously.