http://www.cnr.it/ontology/cnr/individuo/prodotto/ID246474
A Prominent R Wave in V1 but not in V2 Is a Specific Sign of a Large Lateral Transmural Infarction (Articolo in rivista)
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- A Prominent R Wave in V1 but not in V2 Is a Specific Sign of a Large Lateral Transmural Infarction (Articolo in rivista) (literal)
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- 2012-01-01T00:00:00+01:00 (literal)
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Daniele Rovai, Gianluca Di Bella, Giuseppe Rossi, Alessandro Pingitore, Antonio L'Abbate (2012)
A Prominent R Wave in V1 but not in V2 Is a Specific Sign of a Large Lateral Transmural Infarction
in Revista española de cardiología (Ed. impr.); Elsevier Doyma, Madrid (Spagna)
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- Daniele Rovai, Gianluca Di Bella, Giuseppe Rossi, Alessandro Pingitore, Antonio L'Abbate (literal)
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- http://dx.doi.org/10.1016/j.rec.2012.05.015 (literal)
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- CNR, Istituto di Fisiologia Clinica, Pisa, Italy. Cardiologia Clinica, Fondazione Toscana Gabriele Monasterio, Pisa, Italy. Dipartimento di Cardiologia, Universita` di Messina, Messina, Italy. Instituto di Scienze della Vita, Scuola Superiore Sant'Anna, Pisa, Italy (literal)
- Titolo
- A Prominent R Wave in V1 but not in V2 Is a Specific Sign of a Large Lateral Transmural Infarction (literal)
- Abstract
- Introduction and objectives: In the absence of right ventricular hypertrophy or bundle-branch block, a prominent R wave in V1 or V2 is considered to reflect a lateral myocardial infarction. We investigated the differences in infarct location, size and transmural extent between patients with prominent R wave in V1 and those with prominent R wave in V2. Methods: We studied 50 patients with a previous first infarction involving left ventricular inferior and/or lateral wall at contrast-enhanced magnetic resonance. Results: A prominent R wave in V1 was present in 8 patients (16%), in V2 in 23 (46%). At magnetic resonance, the infarction involved the inferior wall in 11 patients (22%), the lateral wall in 6 (12%), and both walls in 33 patients (66%). The sensitivity of a prominent R wave in V1 in detecting a lateral infarction was low (17.9%), while the specificity was high (90.9%). The sensitivity and specificity of a prominent R wave in V2 were 46.2% and 54.5%, respectively. In patients with a prominent R wave in V1, infarct size and lateral and transmural extent were greater than in patients without this pattern (P<.005, <.001, and <.05, respectively); conversely, infarct size and transmural extent in the inferior wall and in its basal-posterior segment were not significantly different. In patients with a prominent R wave in V2,
infarct size, lateral and transmural extent were not different from patients without this pattern. Conclusions: Only a prominent R wave in V1 is a specific sign of large and transmural lateral infarction. (literal)
- Introduccion y objetivos: Si no hay hipertrofia ventricular derecha o bloqueo de rama del haz, se considera que la presencia de una onda R prominente en V1 o V2 refleja un infarto de miocardio de la pared lateral. Hemos investigado las diferencias existentes en cuanto a localizacio´n, taman~o y extensio´n transmural del infarto entre los pacientes con una onda R prominente en V1 y los que presentan una onda R prominente en V2.
Me´todos: Estudiamos a 50 pacientes con un primer infarto previo que hab?´a afectado a la pared inferior y/o lateral del ventr?´culo izquierdo utilizando resonancia magne´ tica con contraste. Resultados: Se observo´ la presencia de una onda R prominente en V1 en 8 pacientes (16%) y en V2
en 23 pacientes (46%). En las ima´genes de resonancia magne´ tica, el infarto afectaba a la pared inferior en 11 pacientes (22%), la pared lateral en 6 (12%) y ambas en 33 (66%). La sensibilidad de la presencia de una onda R prominente en V1 para la deteccio´n de un infarto de cara lateral fue baja (17,9%), mientras que la especificidad fue alta (90,9%). La sensibilidad y la especificidad de una onda R prominente en V2 fueron del 46,2 y el 54,5% respectivamente. En los pacientes con una onda R prominente en V1, el taman~o del infarto y la extensio´n lateral y transmural fueron mayores que en los pacientes que no mostraban este patro´n (p < 0,005, p < 0,001 y p < 0,05 respectivamente); en cambio, el taman~o del infarto y la extensio´n transmural en la pared inferior y en su segmento posterobasal no mostraron diferencias significativas. En los pacientes con una onda R prominente en V2, el taman~o del infarto y la extensio´n lateral y transmural no fueron diferentes de lo observado en los pacientes sin ese patro´ n.
Conclusiones: Tan so´ lo la presencia de una onda R prominente en V1 constituye un signo espec?´fico de un infarto lateral grande y transmural. (literal)
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