General Medicine for NEET-PG
Heart Failure for NEET-PG
Heart failure covers the syndrome of impaired cardiac output and its evidence-based management, and it is a core NEET-PG cardiology topic. The subject spans the distinction between reduced and preserved ejection fraction, the compensatory neurohormonal mechanisms, and the drugs proven to reduce mortality. Because management questions test which agents improve survival versus which only relieve symptoms, that distinction is the key deliverable. Examiners favour the pathophysiology of the renin-angiotensin system, the mortality benefit of specific drug classes, the role of natriuretic peptides in diagnosis, and the features that separate left-sided from right-sided failure. Acute pulmonary oedema management recurs frequently. The topic links to antihypertensive pharmacology, myocardial infarction, and renal physiology. Common traps include assuming diuretics improve survival when they mainly relieve congestion, forgetting that beta-blockers are started only when the patient is stable and not in acute decompensation, and mixing up the clinical signs of left versus right heart failure.
MedNext Academy | 3 min read
Heart Failure for NEET-PG
Heart failure covers the syndrome of impaired cardiac output and its evidence-based management, and it is a core NEET-PG cardiology topic. The subject spans the distinction between reduced and preserved ejection fraction, the compensatory neurohormonal mechanisms, and the drugs proven to reduce mortality. Because management questions test which agents improve survival versus which only relieve symptoms, that distinction is the key deliverable. Examiners favour the pathophysiology of the renin-angiotensin system, the mortality benefit of specific drug classes, the role of natriuretic peptides in diagnosis, and the features that separate left-sided from right-sided failure. Acute pulmonary oedema management recurs frequently. The topic links to antihypertensive pharmacology, myocardial infarction, and renal physiology. Common traps include assuming diuretics improve survival when they mainly relieve congestion, forgetting that beta-blockers are started only when the patient is stable and not in acute decompensation, and mixing up the clinical signs of left versus right heart failure.
Heart failure covers the syndrome of impaired cardiac output and its evidence-based management, and it is a core NEET-PG cardiology topic. The subject spans the distinction between reduced and preserved ejection fraction, the compensatory neurohormonal mechanisms, and the drugs proven to reduce mortality. Because management questions test which agents improve survival versus which only relieve symptoms, that distinction is the key deliverable. Examiners favour the pathophysiology of the renin-angiotensin system, the mortality benefit of specific drug classes, the role of natriuretic peptides in diagnosis, and the features that separate left-sided from right-sided failure. Acute pulmonary oedema management recurs frequently. The topic links to antihypertensive pharmacology, myocardial infarction, and renal physiology. Common traps include assuming diuretics improve survival when they mainly relieve congestion, forgetting that beta-blockers are started only when the patient is stable and not in acute decompensation, and mixing up the clinical signs of left versus right heart failure.
Key points
- **Classification by ejection fraction:** Heart failure with reduced ejection fraction has a low fraction; preserved ejection fraction has normal fraction with impaired filling.
- **Mortality-reducing drugs:** ACE inhibitors or ARBs, beta-blockers, mineralocorticoid antagonists, and SGLT2 inhibitors improve survival in reduced ejection fraction.
- **Symptom relief:** Diuretics relieve congestion and breathlessness but do not by themselves prolong survival.
- **Natriuretic peptides:** BNP and NT-proBNP support diagnosis and rule-out; low levels make heart failure unlikely in a breathless patient.
- **Left-sided failure:** Presents with dyspnoea, orthopnoea, paroxysmal nocturnal dyspnoea, and pulmonary crackles from pulmonary congestion.
- **Right-sided failure:** Presents with raised jugular venous pressure, hepatomegaly, and peripheral oedema from systemic venous congestion.
- **Acute pulmonary oedema:** Managed with sitting up, oxygen, intravenous loop diuretic, nitrates, and non-invasive ventilation as needed.
- **Beta-blocker timing:** Started only when the patient is stable and euvolaemic, never during acute decompensation, then titrated slowly.
- **Digoxin role:** Reduces symptoms and hospitalisation but not mortality; useful for rate control in coexisting atrial fibrillation.
- **Device therapy:** Implantable defibrillators and cardiac resynchronisation help selected patients with low ejection fraction and conduction delay.
- **Precipitants:** Non-adherence, infection, arrhythmia, ischaemia, and excess salt or fluid commonly trigger decompensation.
Frequently Asked Questions
Which heart failure drugs actually improve survival?
ACE inhibitors or ARBs, evidence-based beta-blockers, mineralocorticoid receptor antagonists, and SGLT2 inhibitors reduce mortality in reduced ejection fraction. Diuretics mainly relieve symptoms.
Why are beta-blockers not started during acute decompensation?
Their negative inotropic effect can worsen an already failing, congested heart. They are introduced once the patient is stable and euvolaemic, then uptitrated gradually.
How do natriuretic peptides help?
BNP and NT-proBNP are raised in heart failure and are especially useful to rule it out. A low level in a breathless patient makes cardiac failure unlikely.
How do left and right heart failure differ clinically?
Left-sided failure causes pulmonary congestion with breathlessness and crackles. Right-sided failure causes systemic congestion with raised jugular venous pressure, hepatomegaly, and oedema.
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