avaliação da perfusão e função miocárdicas em vítimas de escorpionismo utilizando o gated-spect evaluación de la perfusión y función miocárdicas en víctimas de escorpionismo utilizando el gated-spect assessment of myocardial perfusion and function in victims of scorpion envenomation using gated-spect
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2010
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Abstract
FUNDAMENTO: O choque cardiogênico e o edema agudo de pulmão são as principais causas de óbito em pacientes com escorpionismo, cujo mecanismo fisiopatológico ainda é controverso. OBJETIVOS: Investigar a correlação entre os distúrbios da perfusão miocárdica e a função contrátil do ventrículo esquerdo, em vítimas de escorpionismo. MÉTODOS: Quinze pacientes submeteram-se à cintilografia de perfusão miocárdica sincronizada com ECG (Gated SPECT), dentro de 72 horas e 15 dias após o acidente escorpiônico. As imagens foram analisadas visualmente por escore semiquantitativo de perfusão (0 = normal, 4 = ausente) e mobilidade (0 = normal, 4 = acinético), utilizando modelo de 17 segmentos. Para cada paciente foram calculados escores somados de perfusão (ESP) e mobilidade (ESM). A fração de ejeção (FEVE) foi calculada por software comercialmente disponível. RESULTADOS: Na avaliação inicial, 12 dos 15 pacientes apresentaram alterações da contratilidade e da perfusão miocárdica. O ESP foi de 12,5 ± 7,3, o ESM de 17,0 ± 12, 8 e a FEVE de 44,6 ± 16,0%. Houve correlação positiva entre o ESP e o ESM (r = 0,68; p = 0,005) e negativa entre o ESP e a FEVE (r = -0,75; p = 0,0021). Os estudos de seguimento mostraram recuperação da contratilidade global (FEVE de 68,9 ± 9,5, p = 0,0002), segmentar (ESM 2,6 ± 3,1, p = 0,0009) e da perfusão (ESP 3,7 ± 3,3, p = 0,0003). A melhora da FEVE correlacionou-se positivamente com a melhora do ESP (r = 0,72; p = 0,0035). CONCLUSÕES: Alterações perfusionais miocárdicas são comuns no envenenamento escorpiônico e correlacionam-se topograficamente com a disfunção contrátil. A recuperação da contratilidade correlaciona-se com a reversibilidade dos defeitos perfusionais. Estes achados sugerem a participação de alterações perfusionais miocárdicas na fisiopatologia desta forma de insuficiência ventricular aguda. (Arq Bras Cardiol 2010;94(4): 444-451)
FUNDAMENTO: El shock cardiogénico y el edema agudo de pulmón son las principales causas de óbito en pacientes con escorpionismo, cuyo mecanismo fisiopatológico es todavía controvertido. OBJETIVO: Investigar la correlación entre los disturbios de la perfusión miocárdica y la función contráctil del ventrículo izquierdo, en victimas de escorpionismo. MÉTODOS: Quince pacientes fueron sometidos a centellografía de perfusión miocárdica sincronizada con ECG (Gated SPECT), dentro de 72 horas y 15 días tras el accidente con escorpión. Las imágenes se analizaron visualmente por score semicuantitativo de perfusión (0 = normal, 4 = ausente) y movilidad (0 = normal, 4 = acinético), utilizando modelo de 17 segmentos. Para cada paciente se calcularon scores sumados de perfusión (ESP) y movilidad (ESM). La fracción de eyección (FEVI) se calculó por software comercialmente disponible. RESULTADOS: En la evaluación inicial, 12 de los 15 pacientes presentaron alteraciones de la contractilidad y de la perfusión miocárdica. El ESP fue de 12,5 ± 7,3, el ESM de 17,0 ± 12, 8 y la FEVI de 44,6 ± 16,0%. Hubo correlación positiva entre el ESP y el ESM (r = 0,68; p = 0,005) y negativa entre el ESP y la FEVI (r = -0,75; p = 0,0021). Los estudios de seguimiento expresaron recuperación de la contractilidad global (FEVI de 68,9 ± 9,5, p = 0,0002), segmentar (ESM 2,6 ± 3,1, p = 0,0009) y de la perfusión (ESP 3,7 ± 3,3, p = 0,0003). La mejora de la FEVI se correlacionó positivamente con la mejora del ESP (r = 0,72; p = 0,0035). CONCLUSIÓN: Alteraciones perfusionales miocárdicas son comunes en el envenenamiento por escorpión y se correlacionan topográficamente con la disfunción contráctil. La recuperación de la contractilidad se correlaciona con la reversibilidad de los defectos perfusionales. Estos hallazgos sugieren la participación de alteraciones perfusionales miocárdicas en la fisiopatología de esta forma de insuficiencia ventricular aguda.
BACKGROUND: Cardiogenic shock and acute pulmonary edema are the major causes of death of patients with scorpion envenomation, whose pathophysiological mechanism remains controversial. OBJECTIVE: To investigate the correlation between myocardial perfusion abnormalities and left ventricular contractile function in victims of scorpion envenomation. METHODS: Fifteen patients underwent ECG-gated myocardial perfusion scintigraphy (gated SPECT) within 72 hours of, and 15 days after scorpion envenomation. Images were analyzed by means of a semi-quantitative visual perfusion score (0 = normal, 4 = absent) and motion score (0 = normal, 4 = akinesia), using the 17-segment model. Summed perfusion (SPS) and summed motion (SMS) scores were calculated for each patient. Ejection fraction (LVEF) was calculated by a commercially available software. RESULTS: At baseline, 12 out of the 15 patients presented abnormal myocardial perfusion and contractility. Mean values of SPS, SMS and LVEF were 12.5 ± 7.3, 17.0 ± 12.8, and 44.6 ± 16.0%, respectively. A positive correlation between SPS and SMS (r = 0.68; p = 0.005) and negative correlation between SPS and LVEF (r = -0.75; p = 0.0021) were found. The follow-up studies showed recovery of global contractility (LVEF of 68.9 ± 9.5, p = 0.0002), segmental contractility (SMS of 2.6 ± 3.1, p = 0.0009) and perfusion (SPS of 3.7 ± 3.3, p = 0.0003). Improvement of LVEF correlated positively with improvement of SPS (r = 0.72; p = 0.0035). CONCLUSIONS: Myocardial perfusion abnormalities are common in scorpion envenomation and correlate topographically with the contractile dysfunction. Recovery of contractility correlates with reversibility of perfusion defects. These findings suggest the participation of myocardial perfusion abnormalities in the pathophysiology of this form of acute ventricular failure. (Arq Bras Cardiol 2010;94(4): 418-425)
FUNDAMENTO: El shock cardiogénico y el edema agudo de pulmón son las principales causas de óbito en pacientes con escorpionismo, cuyo mecanismo fisiopatológico es todavía controvertido. OBJETIVO: Investigar la correlación entre los disturbios de la perfusión miocárdica y la función contráctil del ventrículo izquierdo, en victimas de escorpionismo. MÉTODOS: Quince pacientes fueron sometidos a centellografía de perfusión miocárdica sincronizada con ECG (Gated SPECT), dentro de 72 horas y 15 días tras el accidente con escorpión. Las imágenes se analizaron visualmente por score semicuantitativo de perfusión (0 = normal, 4 = ausente) y movilidad (0 = normal, 4 = acinético), utilizando modelo de 17 segmentos. Para cada paciente se calcularon scores sumados de perfusión (ESP) y movilidad (ESM). La fracción de eyección (FEVI) se calculó por software comercialmente disponible. RESULTADOS: En la evaluación inicial, 12 de los 15 pacientes presentaron alteraciones de la contractilidad y de la perfusión miocárdica. El ESP fue de 12,5 ± 7,3, el ESM de 17,0 ± 12, 8 y la FEVI de 44,6 ± 16,0%. Hubo correlación positiva entre el ESP y el ESM (r = 0,68; p = 0,005) y negativa entre el ESP y la FEVI (r = -0,75; p = 0,0021). Los estudios de seguimiento expresaron recuperación de la contractilidad global (FEVI de 68,9 ± 9,5, p = 0,0002), segmentar (ESM 2,6 ± 3,1, p = 0,0009) y de la perfusión (ESP 3,7 ± 3,3, p = 0,0003). La mejora de la FEVI se correlacionó positivamente con la mejora del ESP (r = 0,72; p = 0,0035). CONCLUSIÓN: Alteraciones perfusionales miocárdicas son comunes en el envenenamiento por escorpión y se correlacionan topográficamente con la disfunción contráctil. La recuperación de la contractilidad se correlaciona con la reversibilidad de los defectos perfusionales. Estos hallazgos sugieren la participación de alteraciones perfusionales miocárdicas en la fisiopatología de esta forma de insuficiencia ventricular aguda.
BACKGROUND: Cardiogenic shock and acute pulmonary edema are the major causes of death of patients with scorpion envenomation, whose pathophysiological mechanism remains controversial. OBJECTIVE: To investigate the correlation between myocardial perfusion abnormalities and left ventricular contractile function in victims of scorpion envenomation. METHODS: Fifteen patients underwent ECG-gated myocardial perfusion scintigraphy (gated SPECT) within 72 hours of, and 15 days after scorpion envenomation. Images were analyzed by means of a semi-quantitative visual perfusion score (0 = normal, 4 = absent) and motion score (0 = normal, 4 = akinesia), using the 17-segment model. Summed perfusion (SPS) and summed motion (SMS) scores were calculated for each patient. Ejection fraction (LVEF) was calculated by a commercially available software. RESULTS: At baseline, 12 out of the 15 patients presented abnormal myocardial perfusion and contractility. Mean values of SPS, SMS and LVEF were 12.5 ± 7.3, 17.0 ± 12.8, and 44.6 ± 16.0%, respectively. A positive correlation between SPS and SMS (r = 0.68; p = 0.005) and negative correlation between SPS and LVEF (r = -0.75; p = 0.0021) were found. The follow-up studies showed recovery of global contractility (LVEF of 68.9 ± 9.5, p = 0.0002), segmental contractility (SMS of 2.6 ± 3.1, p = 0.0009) and perfusion (SPS of 3.7 ± 3.3, p = 0.0003). Improvement of LVEF correlated positively with improvement of SPS (r = 0.72; p = 0.0035). CONCLUSIONS: Myocardial perfusion abnormalities are common in scorpion envenomation and correlate topographically with the contractile dysfunction. Recovery of contractility correlates with reversibility of perfusion defects. These findings suggest the participation of myocardial perfusion abnormalities in the pathophysiology of this form of acute ventricular failure. (Arq Bras Cardiol 2010;94(4): 418-425)
| Reference Key |
figueiredo2010arquivosavaliao
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| Authors | ;Alexandre Baldini de Figueiredo;Palmira Cupo;Antônio O Pintya;Fábio Caligaris;José A Marin-Neto;Sylvia E Hering;Marcus Vinicius Simões |
| Journal | revista cubana de ciencias informáticas |
| Year | 2010 |
| DOI |
10.1590/S0066-782X2010000400003
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