(Circulation. 2002;106:e223.)
© 2002 American Heart Association, Inc.
Correspondence |
Pediatric Cardiology, Institute of Pediatrics, University of Rome "La Sapienza", Rome, Italy, bruno.marino@uniroma1.it
To the Editor:
In a recent issue of Circulation, we saw the interesting images concerning magnetic resonance angiography in a patient with crisscross heart.1 In the description of the case, the authors correctly report the atrial situs (solitus), the position of the ventricle (inverted), and the connection of the great arteries (discordant with Lposition of the aorta).
This is the most frequent anatomical pattern of crisscross heart.2 Despite the inverted position of the ventricle, however, these patients have a Dventricular loop, not a Lventricular loop as suggested by the authors.1 In fact, the atrioventricular connections are concordant and the topology of the right ventricle is of the "right hand" type.2,4,5 The case reported by the authors1 is a "complete transposition of great arteries" with an exaggerated Dlooping movement bringing the anatomic right ventricle to the left and causing the crossed atrioventricular connections. By contrast, the crisscross heart with Lventricular loop is a "congenitally corrected transposition of great arteries" with an exaggerated Llooping movement that brings the anatomic right ventricle to the right, maintaining its "left hand" topology.4,5 Authors who have described crisscross heart previously are in agreement with this anatomic description of the ventricular loop and with this embryological explanation.25
References
1. Araoz PA, Reddy GP, PD, Higgins CB. Magnetic resonance angiography of crisscross heart. Circulation. 2002; 105: 537538.
2. Marino B, Sanders S, Pasquini L, et al. Twodimensional echocardiographic anatomy in crisscross heart. Am J Cardiol. 1986; 58: 325333.[CrossRef][Medline] [Order article via Infotrieve]
3. Tadavarthy SM, Formanek A, CastanedaZuniga W, et al. The three types of crisscross heart: a simple rotational anomaly. Br J Radiol. 1981; 54: 736743.
4. Anderson RH. Crisscross hearts revisited. Pediatr Cardiol. 1982; 3: 305312.[CrossRef][Medline] [Order article via Infotrieve]
5. Van Praagh R. Nomenclature and classification: morphologic and segmental approach to diagnosis. In: Moller JH, Hoffman JIE, eds. Pediatric Cardiovascular Medicine. Philadelphia, Pa: Churchill Livingstone; 2000.
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