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Decreasing rates of pacemaker implantation in patients who have undergone TAVI procedures with Medtronic's CoreValve may hint at solutions to the "pacemaker issue."

Medtronic's CoreValve TAVI

One in 4 patients who received Medtronic's (NYSE:MDT) CoreValve system between Dec. 2007 and March 2012 also received a pacemaker to counter complications following the procedure, but that's down from earlier reports and new strategies may push rates even lower.

Just a year-and-a-half ago reports from the U.K. concluded that 1 in 3 CoreValve patients required a pacemaker within 30 days of the procedure, higher than seen with rival Edwards Lifesciences' (NYSE:EW) Sapien valve.

Physicians have come up with a handful of strategies that may reduce the need for patients to receive pacemakers alongside heart valves, posing a potential solution to what some call the "pacemaker issue."

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