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This academic presentation, entitled "Left Heart Failure," provides an in-depth clinical examination of heart failure specifically affecting the left ventricle. Structured for medical students and healthcare practitioners, the content meticulously indexes key topics including the distinction between systolic and diastolic failure, underlying etiologies, and advanced management strategies. It utilizes critical medical terminology such as paroxysmal nocturnal dyspnoea (PND), ventricular hypertrophy, and the Renin–Angiotensin–Aldosterone System (RAAS). The document explains the "backward failure" mechanism leading to pulmonary edema and the "forward failure" resulting in systemic hypoperfusion. Key causes like Coronary Artery Disease (CAD) and cardiomyopathy are discussed alongside pharmacological interventions including ACE inhibitors, beta-blockers, and aldosterone antagonists. This technical resource is essential for understanding cardiac remodeling and chronic congestion.
Typology: Slides
2024/2025
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Introduction
Heart failure is a chronic condition where the heart cannot pump blood efficiently, often categorized by the affected side (left vs. right) Left-sided heart failure occurs when the left ventricle cannot efficiently pump blood to the body, causing blood to back up into the lungs leading to fluid accumulation in the lungs
Pathophysiology
Hemodynamic Consequences
- (^) Backward Failure: When the LV fails to empty, blood backs up into the left atrium and pulmonary veins. This increases pressure in the pulmonary capillaries, causing fluid to leak into the lung tissue (interstitial edema) and alveoli (pulmonary edema). This is why patients experience shortness of breath and crackles in the lungs.
- (^) Forward Failure: Decreased cardiac output means vital organs receive less oxygen-rich blood. This can lead to fatigue, muscle weakness, and impaired kidney or liver function.
compensatory mechanism
- (^) RAAS activation (Renin–Angiotensin–Aldosterone System): Retains sodium and water and causes Vasoconstriction→ ↑ blood volume.But also make their hurt work harder.
- (^) Sympathetic nervous system activation: ↑ Heart rate and contractility
- (^) Ventricular hypertrophy/remodeling: Heart muscle thickens or dilates to maintain output.
symptoms
- (^) Shortness of breath (Dyspnea)
- (^) Paroxysmal nocturnal dyspnoea (PND): Waking up suddenly at night struggling to breathe
- (^) Chronic coughing or wheezing: Sometimes producing white or pink mucus.
- (^) Fatigue and weakness: Due to poor oxygen delivery to muscles.
- (^) Rapid weight gain: Due to fluid retention.
- (^) Edema: Swelling in the ankles, legs, or abdomen.
- (^) confusion. Enlarged heart swollen feet