Are reciprocal changes a consequence of " XXXX at a distance" or merely a benign electrical phenomenon? A pulsed-wave tissue Doppler echocardiographic study.

@entity1 @entity308 @entity63 @entity1188 @entity4156 @entity741 @entity583 @entity1054
OBJECTIVES: The aim of the present study was to investigate whether @entity308 in precordial leads at the time of @entity4156 represents a reciprocal change rather than concurrent anterior wall @entity63 on the surface electrocardiography. BACKGROUND: The mechanism of reciprocal @entity308 during acute @entity583 is controversial. " @entity63 at a distance" or a benign electrical phenomenon has been implicated in numerous reports. Pulsed-wave tissue Doppler (PWTD) echocardiography can be used to examine the regional diastolic motion of the left ventricular myocardial wall and may allow the detection of @entity63 segments. METHODS: We evaluated regional @entity741 using PWTD echocardiography in 48 @entity1 with a first @entity583 . The left ventricle was divided into 16 segments. PWTD echocardiographic velocities were obtained from each left ventricular segments. RESULTS: Reciprocal @entity308 was present in 35 @entity1 (Group 1) but not in the remaining 13 @entity1 (Group 2). There were no significant differences between groups 1 and 2 with respect to systolic (S) (7.4 +/- 1.1 vs 6.8 +/- 0.9 cm/s; P > 0.05), early (E) (10.5 +/- 2 vs 9.4 +/- 1.2 cm/s; P > 0.05), and late (A) (9.5 +/- 3.2 vs 8.5 +/- 2.3 cm/s; P > 0.05) diastolic waves peak velocities, E/A ratio 1.1 +/- 0.2 vs 1.1 +/- 0.1; P > 0.05), Ewave deceleration time (DT) (92 +/- 17 vs 101 +/- 16 ms; P > 0.05) and regional @entity1054 ( @entity1054 ) (82 +/- 19 vs 93 +/- 21 ms; P > 0.05) in anterior wall (basal levels), which correspond to reciprocal @entity308 on electrocardiography. According to E/A ratio detected by PWTD echocardiography in anterior wall and anterior septum, @entity1 with reciprocal @entity308 were also divided into two groups: Group A, with E/A ratio > 1; Group B, with E/A ratio < 1. Among the 35 @entity1 with reciprocal @entity308 , anterior wall @entity63 was present in 10 @entity1 and absent in 25 @entity1 , whereas anterior septal @entity63 was present 12 @entity1 and absent in 23 @entity1 . CONCLUSIONS: Reciprocal @entity308 during the early phases of inferior @entity1188 is an electrical reflection of primary ST segment elevation in the area of @entity1188 .
