Developer site: The content shown here is test data.

MyEClinic
MyEClinic
Health Dictionary AI Health Chat Find an Online Doctor
A serene Zen garden with raked sand and smooth stones, symbolising clarity and calm

Health Dictionary

Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

Back to skin conditions

Andersen-Tawil syndrome electrocardiogram

Introduction

Overview

Overview

An ECG may be very helpful in the diagnosis of Andersen-Tawil Syndrome. Findings on an ECG diagnostic of Andersen-Tawil Syndrome include a long QTc (LQT) interval, U waves, wide T-U junction and T-waves.

Electrocardiogram

Electrocardiogram

An ECG may be helpful in the diagnosis of Andersen-Tawil Syndrome. Findings on an ECG diagnostic of Andersen-Tawil Syndrome include:[1]

“U on P” sign and U-wave masquerading P-wave
“U on P” sign (black arrow). “U on P” sign (U-wave masquerading P-wave) ; the P-wave during sinus tachycardia is inscribed on the U-wave of the preceding beat. Case courtesy by Piotr Kukla et al[5]
Pseudo – LQTS pattern
Post- extrasystolic “pseudo – LQTS pattern” (arrows). This is detected in a sinus beat following a PVC. The fusion of T+U-waves can mimic LQTS. This pattern is not observed in the subsequent sinus beats. Case courtesy by Piotr Kukla et al[6]
Pseudo “Tee – Pee sign” (black arrow). Pseudo “Tee-pee sign” during a PVC, there is a prolongation of the descending limb of the T+U-wave. In ATS1, the QT interval can appeared prolonged and difficult to quantify because of a prominent U-wave. In order to properly determine the QT interval, the tangent technique should be carefully applied.Case courtesy by Piotr Kukla et al[7]
References

References

  1. ↑ Kukla P, Biernacka EK, Baranchuk A, Jastrzebski M, Jagodzinska M (2014). “Electrocardiogram in Andersen-Tawil syndrome. New electrocardiographic criteria for diagnosis of type-1 Andersen-Tawil syndrome”. Curr Cardiol Rev. 10 (3): 222–8. doi:10.2174/1573403×10666140514102528. PMC 4040873. PMID 24827800.
  2. ↑ Zhang L, Benson DW, Tristani-Firouzi M, Ptacek LJ, Tawil R, Schwartz PJ; et al. (2005). “Electrocardiographic features in Andersen-Tawil syndrome patients with KCNJ2 mutations: characteristic T-U-wave patterns predict the KCNJ2 genotype”. Circulation. 111 (21): 2720–6. doi:10.1161/CIRCULATIONAHA.104.472498. PMID 15911703.
  3. ↑ Khan IA (2002). “Clinical and therapeutic aspects of congenital and acquired long QT syndrome”. Am J Med. 112 (1): 58–66. doi:10.1016/s0002-9343(01)01011-7. PMID 11812408.
  4. ↑ Passman R, Kadish A (2001). “Polymorphic ventricular tachycardia, long Q-T syndrome, and torsades de pointes”. Med Clin North Am. 85 (2): 321–41. doi:10.1016/s0025-7125(05)70318-7. PMID 11233951.
  5. ↑ “Electrocardiogram in Andersen-Tawil Syndrome. New Electrocardiographic Criteria for Diagnosis of Type-1 Andersen-Tawil Syndrome”.
  6. ↑ “Electrocardiogram in Andersen-Tawil Syndrome. New Electrocardiographic Criteria for Diagnosis of Type-1 Andersen-Tawil Syndrome”.
  7. ↑ “Electrocardiogram in Andersen-Tawil Syndrome. New Electrocardiographic Criteria for Diagnosis of Type-1 Andersen-Tawil Syndrome”.


Template:WikiDoc Sources

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Vamsikrishna Gunnam M.B.B.S [2]