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Lead-associated Superior Vena Cava Syndrome.
Andrew H Locke1, David J Shim1, Jessica Burr2
1Harvard-Thorndike Electrophysiology Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
Summary
Superior vena cava (SVC) syndrome, a rare complication of transvenous devices, can affect subcutaneous implantable cardioverter-defibrillator (S-ICD) candidacy. Treating SVC obstruction may restore eligibility for S-ICD therapy.
Area of Science:
- Cardiology
- Medical Devices
- Vascular Medicine
Background:
- Superior vena cava (SVC) syndrome is a rare complication of transvenous cardiac implantable electronic devices.
- Current management strategies for SVC syndrome lack defined optimal protocols.
- Subcutaneous implantable cardioverter-defibrillator (S-ICD) offers an alternative to transvenous systems.
Observation:
- A case of lead-associated SVC syndrome complicated S-ICD QRS vector screening due to thoracic venous congestion.
- SVC obstruction directly influenced the preimplant assessment for S-ICD suitability.
Findings:
- Treatment of SVC obstruction can alter QRS amplitude.
- Patients initially ineligible for S-ICD may become candidates after venous obstruction resolution.
Implications:
- This case highlights the importance of assessing SVC patency before S-ICD implantation.
- Management of SVC syndrome may expand S-ICD candidacy in select patient populations.
- Further research is needed to define optimal management for lead-associated SVC syndrome.
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