RESUMO
Objective: To compare wall motion score at 6weeks in patients with short and normal deceleration time on day 1 after acute MI
Study Design: Cohort study
Setting: Cardiology Department Sheikh Zayed Hospital Lahore
Sample Size: 100 patients
Sample Technique: Non probability convenient sampling
Data Collection Procedure: In my study I evaluated 100 patients with acute MI on day 1 and at six weeks post MI. All patients were treated with streptokinase and heparin. Echocardiography was performed using Vivid I ultrasound machine [GE medical system]. Patients were divided in two equal groups depending on deceleration time, group A [DT <150 ms] and group B [DT >150 ms] on day 1 post MI .Their wall motion score ,left ventricular volumes and ejection fraction were compared at base line and at six weeks
Results: Patients with short DT showed higher wall motion score [29 +/- 3 vs 20 +/- 2.5] higher left ventricular volumes [LVEDV 98 +/- 21 vs 77 +/- 8, LVESV 64 +/- 13 vs 38 +/- 6 ] and lower ejection fraction [37 +/- 5 vs 50 +/- 4] at base line. Also, at 6 weeks, patients with short DT showed less improvement in wall motion score [27 +/- 2 vs 17 +/- 6] and ejection fraction [39 +/- 5 vs 53 +/- 5] compared to patients with normal deceleration time
Conclusion: Patients with short deceleration time have larger infarcts[high WMS], poorer left ventricular systolic function and are at higher risk of ventricular remodeling compared to patients with normal deceleration time. DT measured post MI is a reliable and noninvasive short term predictor of outcome after MI