<prompt> Which of the following drug is used to perform stress echo?NoradrenalineAdenosineAdrenalineDobutamine  <response>: Dobutamine acts on beta 1 and beta2 receptors the hea contains beta1 receptors by stimulating beta1 receptors, dobutamine is producing stress-used for a stress echocardiogram An echo is a test used to assess the heas function and structures. A stress echocardiogram is a test done to assess how well the hea works under stress. The stress can be triggered by either exercise on a treadmill or a medicine called dobutamine. Ref: KD Tripathi 8th ed. 