Early repolarization pattern associated with coronary artery disease and increased the risk of cardiac death in acute myocardium infarction

Purpose Incidental cardiac irradiation during treatment of thoracic neoplasms has increased risks for subsequent acute myocardial infarction or sudden cardiac death. Identifying patients who have a high risk for a coronary event may decrease morbidity and mortality. The objective of this study was to evaluate whether stress imaging can identify severe, unsuspected coronary stenoses in patients who had prior mediastinal irradiation for Hodgkin's disease. Patients and Methods We enrolled 294 outpatients observed at a tertiary care cancer treatment center after mediastinal irradiation doses ≥ 35 Gy for Hodgkin's disease who had no known ischemic cardiac disease. Patients underwent stress echocardiography and radionuclide perfusion imaging at one stress session. Coronary angiography was performed at the discretion of the physician. Results Among the 294 participants, 63 (21.4%) had abnormal ventricular images at rest, suggesting prior myocardial injury. During stress testing, 42 patients (14%) developed perfusion defects (n = 26), impaired wall motion (n = 8), or both abnormalities (n = 8). Coronary angiography showed stenosis ≥ 50% in 22 patients (55%), less than 50% in nine patients (22.5%), and no stenosis in nine patients (22.5%). Screening led to bypass graft surgery in seven patients. Twenty-three patients developed coronary events during a median of 6.5 years of follow-up, with 10 acute myocardial infarctions (two fatal). Conclusion Stress-induced signs of ischemia and significant coronary artery disease are highly prevalent after mediastinal irradiation in young patients. Stress testing identifies asymptomatic individuals at high risk for acute myocardial infarction or sudden cardiac death.

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Abstract 3118: Combined Assessment of Intima-Media Thickness and Echolucency of an Atherosclerotic Plaque in Carotid Artery has an Additive Value on Prediction of Future Coronary Events in Patients with Coronary Artery Disease and Carotid Atherosclerosis

Circulation ◽

10.1161/circ.118.suppl_18.s_1095-b ◽

2008 ◽

Vol 118 (suppl_18) ◽

Author(s):

Mitsumasa Hirano ◽

Takamitsu Nakamura ◽

Yoshinobu Kitta ◽

Isao Takishima ◽

Aritaka Makino ◽

...

Keyword(s):

Myocardial Infarction ◽

Coronary Artery Disease ◽

Coronary Artery ◽

Carotid Artery ◽

Unstable Angina ◽

Cardiac Death ◽

Intima Media Thickness ◽

Ultrasound Assessment ◽

Coronary Events ◽

Artery Disease

Single ultrasound assessment of either intima-media thickness (IMT) or plaque echolucency of carotid artery is considered a surrogate for systemic atherosclerotic burden and provides prognostic information for coronary events. The assessment of IMT and plaque echolucency of carotid artery has the advantage of obtaining structural and compositional information on atherosclerotic plaques in a single session. This study examined the hypothesis that the combined ultrasound assessment of IMT and echolucency in a carotid artery may have an additive effect on the prediction of coronary events in patients with coronary artery disease (CAD). Ultrasound assessment of carotid IMT and plaque echolucency with integrated backscatter (IBS) analysis (intima-media IBS value minus adventitia IBS) was performed in 411 patients with CAD and carotid plaques (IMT ≥ 1.1 mm). The plaque with the greatest axial thickness in carotid arteries was the target for measurement of maximum IMT (plaque-IMTmax) and echolucency (lower IBS reflects echolucent plaque). All patients were prospectively followed up for 70 months or until the occurrence of one of the following coronary events: cardiac death, nonfatal myocardial infarction, or unstable angina pectoris requiring revascularization. During follow-up, 49 coronary events occurred (cardiac death in 2, myocardial infarction in 10, unstable angina in 37). In a multivariate Cox hazards analysis, plaque-IMTmax and plaque echolucency (lower IBS value) were significant predictors of coronary events (HR; 1.82 and 0.85, 95% CI 1.2 – 2.9 and 0.80 – 0.91, respectively, both p < 0.01) independently of age, LDL-C levels, and diabetes. When outcomes were stratified according to plaque-IMTmax and plaque echolucency in combination or alone, the combination of plaque-IMTmax and plaque echolucency was the strongest predictor of events, followed by plaque echolucency and plaque-IMTmax, on the basis of the c -statistic (area under the ROC curve; 0.80, 0.73, and 0.71, respectively). Combined ultrasound assessment of IMT and echolucency of carotid plaque had an additive value on the prediction of coronary events, and these simultaneous ultrasound measurements may be useful for risk stratification in CAD.

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P5647Temporal variability of T-wave morphology and risk of sudden cardiac death in patients with coronary artery disease

European Heart Journal ◽

10.1093/eurheartj/ehz746.0590 ◽

2019 ◽

Vol 40 (Supplement_1) ◽

Author(s):

J T Rahola ◽

A M Kiviniemi ◽

O H Ukkola ◽

M P Tulppo ◽

M J Junttila ◽

...

Keyword(s):

Coronary Artery Disease ◽

Coronary Artery ◽

Sudden Cardiac Death ◽

Spatial Heterogeneity ◽

Temporal Variability ◽

Cardiac Death ◽

T Wave ◽

Clinical Risk ◽

Wave Morphology ◽

Artery Disease

Abstract Background The possible relationship between temporal variability of electrocardiographic spatial heterogeneity of repolarisation and the risk of sudden cardiac death (SCD) in patients with coronary artery disease (CAD) is not completely understood. Purpose To investigate the prognostic value of temporal variability of T-wave spatial heterogeneity in SCD in patients with CAD. Methods The Innovation to reduce Cardiovascular Complications of Diabetes at the Intersection (ARTEMIS) study population consisted of 1,946 patients with angiographically verified CAD. T-wave morphology dispersion (TMD), which estimates the average angle between all reconstruction vector pairs in T-wave loop based on leads I-II and V2-V6, was analysed on beat-to-beat basis from 10 minutes period of the baseline electrocardiographic recording in 1,678 study subjects. The temporal variability of TMD was evaluated by standard deviation of TMD (TMD-SD). Results After on average of 7.4±2.0 years of follow-up, a total of 47 of the 1,678 study subjects (2.8%) had experienced SCD or were resuscitated from sudden cardiac arrest (SCA). TMD-SD was significantly higher in patients who had experienced SCD/SCA compared with those who remained alive (3.64±2.57 vs. 2.65±2.54, p<0.01, respectively), but did not differ significantly between the patients who had experienced non-sudden cardiac death (n=40, 2.4%) and those who remained alive (2.98±2.43 vs. 2.67±2.55, p=0.45, respectively) or between the patients who succumbed to non-cardiac death (n=88, 5,2%) and those who stayed alive (2.74±2.44 vs. 2.67±2.55, p=0.81). After adjustments with relevant clinical risk indicators of SCD/SCA, such as left ventricular ejection fraction, diabetes, left bundle branch block and Canadian Cardiac Society class, TMD-SD still predicted SCD/SCA (HR 1.113, 95% CIs 1.028–1.206, p<0.01). The discrimination and reclassification accuracy increased significantly (p=0.02, p=0.033) and the C-index increased from 0.733 to 0.741 when TMD-SD was added to the clinical risk model of SCD/SCA. The Kaplan-Meier survival curves show proportional probabilities of event-free survival for different modes of death for patients classified according to the optimised TMD-SD cut-off point (Figure). Figure 1 Conclusions Temporal variability of electrocardiographic spatial heterogeneity of repolarisation represented by TMD-SD independently predicts long-term risk of SCD/SCA in patients with CAD. Acknowledgement/Funding Sigrid Juselius Foundation and Finnish Foundation for Cardiovascular Research

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Sudden Cardiac Death in the Young

Circulation Cardiovascular Quality and Outcomes ◽

10.1161/circoutcomes.119.006470 ◽

2020 ◽

Vol 13 (10) ◽

Cited By ~ 1

Author(s):

Francis J. Ha ◽

Hui-Chen Han ◽

Prashanthan Sanders ◽

Kim Fendel ◽

Andrew W. Teh ◽

...

Keyword(s):

Risk Factors ◽

Coronary Artery Disease ◽

Body Mass Index ◽

Coronary Artery ◽

Sudden Cardiac Death ◽

Odds Ratio ◽

Cardiac Death ◽

Arrhythmic Death ◽

Sudden Arrhythmic Death Syndrome ◽

Artery Disease

Background: Sudden cardiac death (SCD) in the young is devastating. Contemporary incidence remains unclear with few recent nationwide studies and limited data addressing risk factors for causes. We aimed to determine incidence, trends, causes, and risk factors for SCD in the young. Methods and Results: The National Coronial Information System registry was reviewed for SCD in people aged 1 to 35 years from 2000 to 2016 in Australia. Subjects were identified by the International Classification of Diseases , Tenth Revision code relating to circulatory system diseases (I00–I99) from coronial reports. Baseline demographics, circumstances, and cause of SCD were obtained from coronial and police reports, alongside autopsy and toxicology analyses where available. During the study period, 2006 cases were identified (median age, 28±7 years; men, 75%; mean body mass index, 29±8 kg/m 2 ). Annual incidence ranged from 0.91 to 1.48 per 100 000 age-specific person-years, which was the lowest in 2013 to 2015 compared with previous 3-year intervals on Poisson regression model ( P =0.001). SCD incidence was higher in nonmetropolitan versus metropolitan areas (0.99 versus 0.53 per 100 000 person-years; P <0.001). The most common cause of SCD was coronary artery disease (40%), followed by sudden arrhythmic death syndrome (14%). Incidence of coronary artery disease–related SCD decreased from 2001–2003 to 2013–2015 ( P <0.001). Proportion of SCD related to sudden arrhythmic death syndrome increased during the study period ( P =0.02) although overall incidence was stable ( P =0.22). Residential remoteness was associated with coronary artery disease–related SCD (odds ratio, 1.44 [95% CI, 1.24–1.67]; P <0.001). For every 1-unit increase, body mass index was associated with increased likelihood of SCD from cardiomegaly (odds ratio, 1.08 [95% CI, 1.05–1.11]; P <0.001) and dilated cardiomyopathy (odds ratio, 1.04 [95% CI, 1.01–1.06]; P =0.005). Conclusions: Incidence of SCD in the young and specifically coronary artery disease–related SCD has declined in recent years. Proportion of SCD related to sudden arrhythmic death syndrome increased over the study period. Geographic remoteness and obesity are risk factors for specific causes of SCD in the young.

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