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Fig. 1 | Cardiovascular Ultrasound

Fig. 1

From: Regional myocardial strain analysis via 2D speckle tracking echocardiography: validation with sonomicrometry and correlation with regional blood flow in the presence of graded coronary stenoses and dobutamine stress

Fig. 1

a Experimental open chest preparation with dissection of the LAD distal to the first diagonal and incorporation of a Doppler flow probe, hydraulic occluder, and snare. The 16-crystal sonomicrometer array contains pairs of subepicardial and subendocardial crystals which define cubic regions in the ischemic, border, and remote LAD territories. A left atrial catheter was also inserted for microsphere administration. b Schematic of experimental protocol. Data acquisitions at each experimental condition include invasive blood pressures, doppler LAD flow measurements, 2D echocardiography, sonimicrometry, and microsphere blood flow analysis

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