T-wave reversal in the augmented unipolar right arm electrocardiographic lead is associated with increased risk of sudden death

Derek Phan, Kumar Narayanan, Audrey Uy-Evanado, Carmen Teodorescu, Kyndaron Reinier, Harpriya Chugh, Karen Gunson, Jonathan Jui, Sumeet S. Chugh

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Background: Repolarization abnormalities are associated with ventricular arrhythmias, and published studies report that a reversal of T wave polarity (positive or flat T wave) in lead aVR may be linked to increased cardiovascular mortality. We evaluated whether a positive or flat T wave in aVR is a risk marker for sudden cardiac death (SCD). Methods: SCD cases from the Oregon Sudden Unexpected Death Study (catchment population ~1 million) were compared to geographic controls with coronary artery disease and no history of SCD. Archived electrocardiograms performed prior and unrelated to the SCD event were evaluated. Results: SCD cases (n = 691, 67.6 ± 14.9 years, 69 % male) were more likely than controls (n = 663, 66.2 ± 11.6 years, 67 % male) to have diabetes (40 vs 32 %; p <0.01), left ventricular ejection fraction (LVEF) ≤35 % (27 vs 11 %; p <0.01), prolonged QTc (≥450 ms; 54 vs 28 %; p <0.01) and positive (19 vs 13 %; p <0.01) or flat T wave (14 vs 7 %; p <0.01) in aVR. On multivariable analysis, a positive/flat T wave in aVR was independently associated with SCD (OR 1.9, 95 % CI 1.3–2.8, p <0.01). However, a positive T wave alone lost statistical significance in patients with LVEF ≤ 35 % and QTc ≥ 450 ms. In a subgroup analysis among patients with normal LVEF, QTc, and no diabetes, a positive T wave in aVR (but not a flat T wave) remained associated with SCD (OR 2.8, 95 % CI 1.2–6.1, p <0.01). Conclusions: A positive or flat T wave in lead aVR was associated with SCD in subsets of patients. This simple ECG marker in this often-ignored lead may contribute to enhancement of SCD risk stratification, and warrants further evaluation.

Original languageEnglish (US)
Pages (from-to)141-147
Number of pages7
JournalJournal of Interventional Cardiac Electrophysiology
Volume45
Issue number2
DOIs
StatePublished - Mar 1 2016

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Sudden Cardiac Death
Sudden Death
Stroke Volume
Electrocardiography
Lead
Cardiac Arrhythmias
Coronary Artery Disease
Mortality

Keywords

  • Electrocardiography
  • Lead aVR
  • Risk stratification
  • Sudden cardiac death

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

Cite this

T-wave reversal in the augmented unipolar right arm electrocardiographic lead is associated with increased risk of sudden death. / Phan, Derek; Narayanan, Kumar; Uy-Evanado, Audrey; Teodorescu, Carmen; Reinier, Kyndaron; Chugh, Harpriya; Gunson, Karen; Jui, Jonathan; Chugh, Sumeet S.

In: Journal of Interventional Cardiac Electrophysiology, Vol. 45, No. 2, 01.03.2016, p. 141-147.

Research output: Contribution to journalArticle

Phan, Derek ; Narayanan, Kumar ; Uy-Evanado, Audrey ; Teodorescu, Carmen ; Reinier, Kyndaron ; Chugh, Harpriya ; Gunson, Karen ; Jui, Jonathan ; Chugh, Sumeet S. / T-wave reversal in the augmented unipolar right arm electrocardiographic lead is associated with increased risk of sudden death. In: Journal of Interventional Cardiac Electrophysiology. 2016 ; Vol. 45, No. 2. pp. 141-147.
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abstract = "Background: Repolarization abnormalities are associated with ventricular arrhythmias, and published studies report that a reversal of T wave polarity (positive or flat T wave) in lead aVR may be linked to increased cardiovascular mortality. We evaluated whether a positive or flat T wave in aVR is a risk marker for sudden cardiac death (SCD). Methods: SCD cases from the Oregon Sudden Unexpected Death Study (catchment population ~1 million) were compared to geographic controls with coronary artery disease and no history of SCD. Archived electrocardiograms performed prior and unrelated to the SCD event were evaluated. Results: SCD cases (n = 691, 67.6 ± 14.9 years, 69 {\%} male) were more likely than controls (n = 663, 66.2 ± 11.6 years, 67 {\%} male) to have diabetes (40 vs 32 {\%}; p <0.01), left ventricular ejection fraction (LVEF) ≤35 {\%} (27 vs 11 {\%}; p <0.01), prolonged QTc (≥450 ms; 54 vs 28 {\%}; p <0.01) and positive (19 vs 13 {\%}; p <0.01) or flat T wave (14 vs 7 {\%}; p <0.01) in aVR. On multivariable analysis, a positive/flat T wave in aVR was independently associated with SCD (OR 1.9, 95 {\%} CI 1.3–2.8, p <0.01). However, a positive T wave alone lost statistical significance in patients with LVEF ≤ 35 {\%} and QTc ≥ 450 ms. In a subgroup analysis among patients with normal LVEF, QTc, and no diabetes, a positive T wave in aVR (but not a flat T wave) remained associated with SCD (OR 2.8, 95 {\%} CI 1.2–6.1, p <0.01). Conclusions: A positive or flat T wave in lead aVR was associated with SCD in subsets of patients. This simple ECG marker in this often-ignored lead may contribute to enhancement of SCD risk stratification, and warrants further evaluation.",
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T1 - T-wave reversal in the augmented unipolar right arm electrocardiographic lead is associated with increased risk of sudden death

AU - Phan, Derek

AU - Narayanan, Kumar

AU - Uy-Evanado, Audrey

AU - Teodorescu, Carmen

AU - Reinier, Kyndaron

AU - Chugh, Harpriya

AU - Gunson, Karen

AU - Jui, Jonathan

AU - Chugh, Sumeet S.

PY - 2016/3/1

Y1 - 2016/3/1

N2 - Background: Repolarization abnormalities are associated with ventricular arrhythmias, and published studies report that a reversal of T wave polarity (positive or flat T wave) in lead aVR may be linked to increased cardiovascular mortality. We evaluated whether a positive or flat T wave in aVR is a risk marker for sudden cardiac death (SCD). Methods: SCD cases from the Oregon Sudden Unexpected Death Study (catchment population ~1 million) were compared to geographic controls with coronary artery disease and no history of SCD. Archived electrocardiograms performed prior and unrelated to the SCD event were evaluated. Results: SCD cases (n = 691, 67.6 ± 14.9 years, 69 % male) were more likely than controls (n = 663, 66.2 ± 11.6 years, 67 % male) to have diabetes (40 vs 32 %; p <0.01), left ventricular ejection fraction (LVEF) ≤35 % (27 vs 11 %; p <0.01), prolonged QTc (≥450 ms; 54 vs 28 %; p <0.01) and positive (19 vs 13 %; p <0.01) or flat T wave (14 vs 7 %; p <0.01) in aVR. On multivariable analysis, a positive/flat T wave in aVR was independently associated with SCD (OR 1.9, 95 % CI 1.3–2.8, p <0.01). However, a positive T wave alone lost statistical significance in patients with LVEF ≤ 35 % and QTc ≥ 450 ms. In a subgroup analysis among patients with normal LVEF, QTc, and no diabetes, a positive T wave in aVR (but not a flat T wave) remained associated with SCD (OR 2.8, 95 % CI 1.2–6.1, p <0.01). Conclusions: A positive or flat T wave in lead aVR was associated with SCD in subsets of patients. This simple ECG marker in this often-ignored lead may contribute to enhancement of SCD risk stratification, and warrants further evaluation.

AB - Background: Repolarization abnormalities are associated with ventricular arrhythmias, and published studies report that a reversal of T wave polarity (positive or flat T wave) in lead aVR may be linked to increased cardiovascular mortality. We evaluated whether a positive or flat T wave in aVR is a risk marker for sudden cardiac death (SCD). Methods: SCD cases from the Oregon Sudden Unexpected Death Study (catchment population ~1 million) were compared to geographic controls with coronary artery disease and no history of SCD. Archived electrocardiograms performed prior and unrelated to the SCD event were evaluated. Results: SCD cases (n = 691, 67.6 ± 14.9 years, 69 % male) were more likely than controls (n = 663, 66.2 ± 11.6 years, 67 % male) to have diabetes (40 vs 32 %; p <0.01), left ventricular ejection fraction (LVEF) ≤35 % (27 vs 11 %; p <0.01), prolonged QTc (≥450 ms; 54 vs 28 %; p <0.01) and positive (19 vs 13 %; p <0.01) or flat T wave (14 vs 7 %; p <0.01) in aVR. On multivariable analysis, a positive/flat T wave in aVR was independently associated with SCD (OR 1.9, 95 % CI 1.3–2.8, p <0.01). However, a positive T wave alone lost statistical significance in patients with LVEF ≤ 35 % and QTc ≥ 450 ms. In a subgroup analysis among patients with normal LVEF, QTc, and no diabetes, a positive T wave in aVR (but not a flat T wave) remained associated with SCD (OR 2.8, 95 % CI 1.2–6.1, p <0.01). Conclusions: A positive or flat T wave in lead aVR was associated with SCD in subsets of patients. This simple ECG marker in this often-ignored lead may contribute to enhancement of SCD risk stratification, and warrants further evaluation.

KW - Electrocardiography

KW - Lead aVR

KW - Risk stratification

KW - Sudden cardiac death

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