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Case Reports
. 2018 Jun 15;4(9):408-411.
doi: 10.1016/j.hrcr.2018.06.004. eCollection 2018 Sep.

Inappropriate shock from delayed T-wave oversensing by a subcutaneous implantable cardioverter-defibrillator after septal myectomy for hypertrophic cardiomyopathy

Benjamin C Salgado  1 , Rita Coram  1 , John Mandrola  2 , Rakesh Gopinathannair  1
Affiliations
Case Reports

Inappropriate shock from delayed T-wave oversensing by a subcutaneous implantable cardioverter-defibrillator after septal myectomy for hypertrophic cardiomyopathy

Benjamin C Salgado et al. HeartRhythm Case Rep. .
No abstract available

Keywords: Hypertrophic cardiomyopathy; Left bundle branch block; SICD; Septal myectomy; T-wave oversensing.

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Figures

Figure 1
Figure 1
A: A 12-lead electrocardiogram prior to septal myectomy showing sinus rhythm, left atrial enlargement, and left axis deviation with a QRS duration of 88 ms. B: A 12-lead electrocardiogram soon after septal myectomy demonstrating normal sinus rhythm, new left bundle branch block, and a QRS duration of 160 ms.
Figure 2
Figure 2
A 12-lead electrocardiogram (ECG) 39 days after septal myectomy showing sinus rhythm with left bundle branch block and a QRS duration of 154 ms. Notice the taller T waves compared to the ECG done shortly after myectomy.
Figure 3
Figure 3
Subcutaneous implantable cardioverter-defibrillator interrogation strip showing sinus tachycardia and inappropriate shock from T-wave oversensing.
Supplemental Figure
Supplemental Figure
Panels A–C show S-ECG tracings comparing primary vector pre- and post-myectomy as well as the alternate vector following the ICD shocks. A: S-ECG at baseline (Pre-Myectomy). B: S-ECG 3 months after myectomy. C: S-ECG 2 months post-shock (sensing vector is alternate with SMARTPASS on). Note QRS axis compared to the T-wave.
Supplemental Figure
Supplemental Figure
Panels A–C show S-ECG tracings comparing primary vector pre- and post-myectomy as well as the alternate vector following the ICD shocks. A: S-ECG at baseline (Pre-Myectomy). B: S-ECG 3 months after myectomy. C: S-ECG 2 months post-shock (sensing vector is alternate with SMARTPASS on). Note QRS axis compared to the T-wave.
Supplemental Figure
Supplemental Figure
Panels A–C show S-ECG tracings comparing primary vector pre- and post-myectomy as well as the alternate vector following the ICD shocks. A: S-ECG at baseline (Pre-Myectomy). B: S-ECG 3 months after myectomy. C: S-ECG 2 months post-shock (sensing vector is alternate with SMARTPASS on). Note QRS axis compared to the T-wave.
See this image and copyright information in PMC

References

    1. Bardy G.H., Smith W.M., Hood M.A. An entirely subcutaneous implantable cardioverter-defibrillator. N Engl J Med. 2010;363:36–44. - PubMed
    1. Bellardine Black C.L., Stromberg K., van Balen G.P., Ghanem R.N., Breedveld R.W., Tieleman R.G. Is surface ECG a useful surrogate for subcutaneous ECG? Pacing Clin Electrophysiol. 2010;33:135–145. - PubMed
    1. Francia P., Adduci C., Palano F., Semprini L., Serdoz A., Montesanti D., Santini D., Musumeci B., Salvati A., Volpe M., Autore C. Eligibility for the subcutaneous implantable cardioverter-defibrillator in patients with hypertrophic cardiomyopathy. J Cardiovasc Electrophysiol. 2015;26:893–899. - PubMed
    1. Randles D.A., Hawkins N.M., Shaw M., Patwala A.Y., Pettit S.J., Wright D.J. How many patients fulfil the surface electrocardiogram criteria for subcutaneous implantable cardioverter-defibrillator implantation? Europace. 2014;16:1015–1021. - PubMed
    1. Olde Nordkamp L.R.A., Warnaars J.L.F., Kooiman K.M., de Groot J.R., Rosenmöller B.R.A.M., Wilde A.A.M., Knops R.E. Which patients are not suitable for a subcutaneous ICD: incidence and predictors of failed QRS-T-wave morphology screening. J Cardiovasc Electrophysiol. 2014;25:494–499. - PubMed

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