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Zorluk: KolayCardiovascular System

Match each of the following specific cardiomyopathies with its most characteristic echocardiographic finding.

  • Dilated cardiomyopathyGlobal enlargement of all four cardiac chambers with significantly reduced left ventricular ejection fraction.
  • Hypertrophic cardiomyopathyAsymmetric septal thickening, often accompanied by systolic anterior motion of the mitral valve.
  • Restrictive cardiomyopathy (e.g., cardiac amyloidosis)Normal or reduced ventricular volumes with marked biatrial enlargement and a classic "speckled" or "granular" myocardial appearance.
  • Stress-induced (Takotsubo) cardiomyopathyTransient apical ballooning and akinesis of the left ventricle with compensatory basal hyperkinesis.

Cevap

The correct pairings are: Dilated cardiomyopathy with global enlargement of all four chambers; Hypertrophic cardiomyopathy with asymmetric septal thickening; Restrictive cardiomyopathy with normal ventricular volumes and biatrial enlargement; and Stress-induced cardiomyopathy with transient apical ballooning.
Each classification of cardiomyopathy has a distinct pathophysiological mechanism that translates into highly specific structural changes visible on an echocardiogram. Recognizing these classic patterns is foundational for distinguishing the cause of heart failure in a clinical setting.

Adım Adım Çözüm

1
Identify the defining structural abnormality of dilated cardiomyopathy.
Matches with global four-chamber enlargement and reduced ejection fraction.
The primary pathology is impaired myocardial contractility leading to compensatory dilation (eccentric hypertrophy).
2
Identify the defining structural abnormality of hypertrophic cardiomyopathy.
Matches with asymmetric septal thickening and systolic anterior motion of the mitral valve.
Genetic mutations in sarcomere proteins cause disorganized cellular hypertrophy, which primarily affects the septum rather than the entire ventricle.
3
Identify the defining structural abnormality of restrictive cardiomyopathy.
Matches with normal ventricular volumes, marked biatrial enlargement, and speckled myocardium.
Infiltrative processes stiffen the ventricles, severely impairing relaxation (diastolic dysfunction) and increasing filling pressures, which causes the atria to dilate while the ventricles remain non-dilated.
4
Identify the defining structural abnormality of stress-induced (Takotsubo) cardiomyopathy.
Matches with transient apical ballooning.
An acute catecholamine surge temporarily stuns the apical myocardium, leading to apical akinesis and a shape resembling a Japanese octopus trap (takotsubo).

Anahtar Kavram

Echocardiographic differentiation of primary cardiomyopathies
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Cardiovascular System

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