MEDICINE
CARDIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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to. Sometimes absent in ventricular and mid-junction extrasystoles, in sinus arrest with leak
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to. Increased voltage in the right atrial growth
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to. Negative in DI and AVL in dextrocardia, situs inversus, poorly placed electrodes
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to. Increase in time in left atrial growth
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All
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Detailed explanation-1: -Dextrocardia is defined as a cardiac position that is a mirror image of normal anatomy. When the position of both the thoracic and abdominal viscera are reversed, this is referred to as dextrocardia with situs inversus (situs inversus totalis).
Detailed explanation-2: -In situs inversus, also called mirror-image dextrocardia, the great vessels and chambers are positioned as a mirror image of a left-sided heart. This malpositioning produces interesting abnormalities that can be seen on a traditional ECG with poor R-wave progression and lack of T-waves.
Detailed explanation-3: -Dextroposition describes a heart on the right with an apex to the left, secondary to extracardiac causes (right lung hypoplasia, pneumonectomy or diaphragmatic hernia). In contrast, dextrocardia results from cardiac chamber disarrangement.
Detailed explanation-4: -Situs inversus totalis is a rare congenital condition with complete reversal of visceral organ orientation occurring in approximately 1/10, 000 live births (1). In this condition, the heart is also found in a mirrored position within the right chest with its apex pointing right.