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Long-term ungrounded cable support for short-to-shield syndrome.
Brian Ayers1, Christina Cheyne1, Katherine Wood1
1University of Rochester Medical Center Rochester NY USA.
Clinical Case Reports
|March 19, 2020
Summary
Short-to-shield (STS) in HeartMate II LVAD patients can be managed with an ungrounded cable. This case series shows no complications in 17 patients over 13 years, suggesting long-term safety.
Area of Science:
- Cardiology
- Biomedical Engineering
- Medical Devices
Background:
- Short-to-shield (STS) is a complication in HeartMate II (HMII) left ventricular assist device (LVAD) patients.
- STS occurs when a damaged driveline wire contacts the sheath, causing power delivery issues with a grounded power base unit (PBU).
Observation:
- This case series evaluated 17 LVAD patients treated for STS using an ungrounded cable.
- A total of 4922 patient-days (13.4 patient-years) of ungrounded cable support were analyzed post-STS treatment.
Findings:
- No deaths or STS-related complications were observed during the follow-up period.
- The ungrounded cable effectively negated the effects of STS.
Implications:
- Long-term use of an ungrounded cable appears to be a safe and reasonable alternative for LVAD patients unable or unwilling to undergo pump exchange or splice repair.
- This strategy offers a viable management option for STS complications in HeartMate II LVAD recipients.
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