2D echocardiography Doppler echocardiography
- A noninvasive diagnostic method that uses ultrasound to visualize cardiac structures.
- Shows global or RWMA (Regional Wall Motion Abnormality) in infarction and ischemia.
- in which dobutamine is given to patients to increase the workload of the heart, and then the heart is evaluated with ultrasonic imaging.
Types of echocardiography —
- Doppler echocardiography
- transesophageal echocardiography:
- transthoracic echocardiography
- multidimensional visualization echocardiography
2D echocardiography Doppler echocardiography
Dobutamine / Stress echocardiography :
- may show areas of dysfunction not seen in rest echocardiography.
- Stress echo is more sensitive than TMT for dia nosis
- Dobutamine stress echocardiography is an important noninvasive clinical tool for the detection of hibernating myocardium
- Impaired left ventricular (LV) function in patients with coronary heart disease is often a partially reversible process
- Transthoracic echocardiography (TTE) is the primary noninvasive imaging of cardiac anatomy and function ,modality for quantitative and qualitative evaluation .
- The positive and negative predictive accuracy of dobutamine infusion for predicting functional improvement of dysfunctional segments after CABG was 91 and 82 percent, respectively.
- 48 of 79 (61 percent) dysfunctional, hypoperfused segments which had inotropic reserve,
- In 31 segments in which systolic function did not improve after CABG
- at least one wall motion score index grade with dobutamine infusion, showed improved regional function after CABG.
- Another factor associated with functional improvement and prognosis after revascularization is the amount of “hibernating” myocardium.
