Related Diagnostic Modalities

Chapter 19


Related Diagnostic Modalities



Steven Gill, John C. Sciarra and Christopher J. Gallagher



Stress Echocardiography


Stress TEE is the same deal as a transthoracic stress echo. You get a baseline reading, stress the heart with some dobutamine, kick up the heart rate to marathon levels and do another exam. Besides seeing a heart running like a race horse, you will also see the hyperdynamic heart and any new wall motion abnormalities compared to the baseline resting heart. When you crank up the dobutamine, new wall motion abnormalities might pop-up revealing at risk myocardium, right? Well, not always. Sometimes, low-dose dobutamine improves ventricular function, but othertimes, you might see a biphasic response which is improving response until reserve is exhausted. At which point you start to fall off the old Starling curve and ventricular function declines to the point of what we call scientifically—“Dead-as-a-doornail” myocardium. That is no response to redbull levels of whipping the heart.




Epicardial Scanning


You cannot do TEE on everybody because of things like esophageal pathology or the 2% of people you can’t get a probe into. So you can go with epicardial scanning. A probe is covered with a sterile sheath and goop and passed onto the surgical field, placed on a sound conductive spacer (remember: air does not transmit sound waves as efficiently as goop), and is then placed directly on the patient’s chest. As mentioned in another section, kiddie cardiac surgery often uses epicardial scanning. You are not hindered by bronchi getting in the way, so you can get a look all over the place.


The Gologorsky method of creating a spacer for epicardial scanning: just fill the tip with gel and place in a sheath. Another common method is to fill a sterile glove with gel or water and use that as a stand-off or spacer.




Jun 4, 2016 | Posted by in CARDIOLOGY | Comments Off on Related Diagnostic Modalities

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