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Figure 3 TransAccess composite catheter (A) incorporates phased-array intravascular ultrasound (IVUS) to accurately guide transvenous myocardial puncture with a sheathed, extendable nitinol needle (black arrow). Once the myocardium is accessed, (B) the IntraLume microinfusion catheter (white arrow) can be advanced to remote areas of myocardium for targeted therapeutic agent delivery. AIV = anterior interventricular coronary vein; IVUS = intravascular ultrasound; LAD = left anterior descending coronary artery; OM = obtuse marginal artery; PDA = posterior descending artery; PDV = posterior descending vein, or middle cardiac vein; PLV = posterolateral vein. Courtesy of Transvascular, Inc.
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