Compare conditions

Put any two — or three — conditions side by side, adult or pediatric, to spot the look-alike differences fast, row by row.

CHF · Heart Failure Decompensation

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In one line

·The heart's pumping power fails, so blood and fluid back up into the lungs and body while organs struggle to get enough oxygen.

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Normal physiology

·The heart has four rooms. Two small top rooms (the right atrium and left atrium) collect blood. Two strong bottom rooms (the right ventricle and left ventricle) pump blood out. The right side pumps blood to the lungs to pick up oxygen. The left side pumps oxygen-rich blood to every organ and muscle. The heart fills when it relaxes (diastole) and empties when it squeezes (systole). Your kidneys sense how much blood is flowing through them and decide how much salt and water to dump into urine or hold onto. When this loop works, every cell gets the oxygen and food it needs, waste gets carried away, and you do not get waterlogged.

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What goes wrong

·The heart muscle either becomes too weak to squeeze blood out strongly, or it gets too stiff to relax and let blood in. Either way, the pump cannot keep up with what your body needs, so blood backs up behind the failing side—into your lungs if the left side fails, or into your legs and belly if the right side fails.

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Hallmark signs

·Short of breath when lying flat (orthopnea)
·Waking up at night gasping for air (paroxysmal nocturnal trouble breathing (dyspnea))
·Crackling or wet sounds when listening to the lungs (rales or crackles)
·Extra heart sound heard early in the heartbeat (S3 gallop)
·Bulging neck veins (jugular venous distension)
·Swollen legs, ankles, or feet (peripheral swelling (edema))
·Sudden weight gain over a few days (often 2 to 3 pounds or more)
·Feeling very tired and weak, even with light activity

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Red flags · escalate now

·Severe shortness of breath at rest or gasping for air
·Chest pain or pressure (may signal a heart attack triggering the heart failure)
·Coughing up pink, frothy spit (sign of severe fluid in the lungs, called pulmonary edema (fluid flooding the lungs))
·Sudden confusion, loss of alertness, or acting strange
·Fast or very irregular heartbeat (may be dangerous arrhythmia like atrial fibrillation (an irregular, quivering heartbeat) or ventricular a fast heart rate (tachycardia))

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Workup

·B-type natriuretic peptide (BNP) or N-terminal pro-BNP (NT-proBNP) blood test
·Chest X-ray (PA and lateral views)
·Transthoracic echocardiogram (ultrasound of the heart)
·Basic metabolic panel (BMP) — sodium, potassium, chloride, bicarbonate, blood urea nitrogen (BUN), creatinine, and glucose
·Complete blood count (CBC) with differential
·Cardiac troponin I or troponin T blood test
·12-lead electrocardiogram (ECG)
·Arterial blood gas (ABG) if the patient is very short of breath, on supplemental oxygen, or showing signs of respiratory failure

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Treatment

·Intravenous (IV) loop diuretic — furosemide (Lasix) 40 mg IV bolus if diuretic-naïve, or 1–2.5 times the patient's home oral daily dose if already on diuretics; can repeat or give continuous infusion if needed
·Vasodilators — IV nitroglycerin (start 5–10 mcg/min, titrate up by 5–10 mcg/min every 5 min to effect or max ~200 mcg/min) or IV nitroprusside (start 0.3 mcg/kg/min, titrate to effect) if systolic BP > 110 mmHg and there is pulmonary edema (fluid flooding the lungs)
·Non-invasive positive pressure ventilation (NIPPV) — BiPAP (bilevel positive airway pressure) or CPAP (continuous positive airway pressure) by tight-fitting face mask
·Guideline-directed medical therapy (GDMT) for chronic heart failure with reduced ejection fraction (HFrEF, LVEF < 40%): ACE inhibitor (e.g. enalapril, lisinopril) or ARB (e.g. losartan, valsartan) if ACE-intolerant; beta-blocker (carvedilol, metoprolol succinate, or bisoprolol); mineralocorticoid receptor antagonist (MRA: spironolactone or eplerenone); and SGLT2 inhibitor (dapagliflozin or empagliflozin). Consider ARNI (sacubitril/valsartan) instead of ACE/ARB once stable.
·Intravenous inotropes (dobutamine 2.5–20 mcg/kg/min or milrinone 0.375–0.75 mcg/kg/min after optional loading dose) if the heart is so weak that systolic blood pressure is < 90 mmHg with signs of poor blood flow (hypoperfusion) (cold skin, altered mental status, rising creatinine, lactic acidosis (acid from oxygen-starved tissues))—this is cardiogenic shock
·Identify and treat the precipitating factor (the trigger): medication nonadherence (especially missed diuretics or starting NSAIDs or calcium channel blockers); dietary indiscretion (eating salty foods, > 2–3 g sodium per day); acute coronary syndrome (heart attack); uncontrolled high blood pressure (hypertension) (BP > 140/90); new or rapid atrial fibrillation (an irregular, quivering heartbeat) or other arrhythmias; infection (pneumonia, UTI, sepsis); anemia (Hgb < 10 g/dL); renal failure; thyroid disease (hyperthyroidism or severe hypothyroidism); pulmonary embolism (a clot lodging in a lung artery); or cardiotoxic drugs (alcohol, chemotherapy like doxorubicin)
·Sodium restriction (< 2–3 grams per day, or < 2000 mg per day) and fluid restriction (1.5–2 liters total per day, ~64 ounces) once the patient is euvolemic and stable; daily weights at the same time each morning

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NCLEX trap

·In heart failure getting worse, the problem is already too much fluid, not too little. The pump is too weak to push blood forward—giving IV fluid makes the backup worse. The body is drowning in its own fluid. Give diuretics (water pills) instead to drain the extra fluid out.
·Crackles in heart failure getting worse come from fluid backing up into the lungs (pulmonary swelling (edema), which means fluid leaking into the air sacs), not from infection. Look at the whole story: puffy legs, high neck veins, and a chest X-ray showing fluid in a butterfly pattern all point to the heart, not pneumonia. Wet lungs from a weak heart look and sound different from infection.
·In heart failure getting worse, low blood pressure with a weak pump means cardiogenic shock (the heart cannot squeeze hard enough to push blood to the body)—a true danger. You need inotropes (medicines that make the heart squeeze harder, like dobutamine or milrinone) or mechanical support devices, not fluids. Fluids will flood the lungs even more. Watch the kidneys (creatinine level) and urine output very closely.
·Oxygen helps the patient breathe better right now, but it does not fix the broken pump. You must also drain the extra fluid with diuretics (like furosemide), lower the pressure the heart has to pump against with nitrates or ACE inhibitors, and help the lungs work with BiPAP (a breathing mask that gently pushes air in). Oxygen alone leaves the root problem untouched.
·Heart failure getting worse comes in two types: reduced ejection fraction (the heart squeezes weakly, called HFrEF) and preserved ejection fraction (the heart is too stiff to relax and fill, called HFpEF). Both back up fluid into the lungs and body. Both need diuretics right now, and long-term medicines like ARNI (sacubitril-valsartan), beta-blocker, MRA (spironolactone or eplerenone), and SGLT2 inhibitor (like dapagliflozin or empagliflozin) to help the heart work better and keep the patient out of the hospital.
·In heart failure getting worse, do not stop ACE inhibitors, ARBs, ARNI, beta-blockers, or MRA suddenly. Hold them only if blood pressure is dangerously low or the kidneys are failing fast (creatinine shooting up). Restart them as soon as it is safe—usually within 24 to 48 hours. These medicines are the reason the patient stayed out of the hospital before; stopping them can make the heart weaken even more.

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