Mechanical Wenckebach Phenomenon in Thrombosed Tricuspid Valve Prosthesis.

• Mechanical valve thrombosis is a serious complication. • Echocardiography and fluoroscopy are cornerstones of diagnosis. • Echocardiography in more than two loops can identify intermittent valve obstruction.

Urine NGAL as a biomarker of kidney damage after on- and off-pump coronary artery bypass graft surgery: a prospective pilot study.

Introduction: Acute kidney injury (AKI) is a relatively frequent complication after coronary artery bypass graft surgery (CABG). We compared the off- and on-pump CABG procedures with respect to changes in renal function as reflected by levels of urine neutrophil gelatinase-associated lipocalin (UrNGAL).

Methods: In a prospective design, we studied patients who underwent CABG, off- or on-pump, with respect to changes in glomerular filtration rate (GFR) and UrNGAL pre- and postoperatively.