Seasonal variation in sudden cardiac death after experimental myocardial infarction

Scherlag, Benjamin J.; Patterson, Eugene; Lazzara, Ralph

doi:10.1016/0022-0736(90)90160-4

Cited by 18 publications

(5 citation statements)

References 12 publications

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“…Several physiologic (blood pressure, serum cholesterol, glucose tolerance, and infection rates), lifestyle (obesity, exercise, and smoking), and environmental (temperature and ultraviolet radiation) risk factors have been associated with seasonal variations in coronary heart disease, which may indirectly influence overall patient condition and perioperative events related to pulmonary resections [20,21]. Neurobiologic phenomena such as activation of the neuroaxial system in response to cold climate has been linked to accelerated inflammatory pathways and enhanced arrhythmia rates in canine models, suggesting a higher propensity for adverse surgical outcomes during the winter months [22]. A higher incidence of depression, seasonal affective disorder, and physical and emotional stress may also contribute to differences in outcomes for patients operated on at different times of the year.…”

Section: Discussionmentioning

confidence: 99%

Seasonal variation influences outcomes following lung cancer resections

LaPar¹,

Nagji²,

Bhamidipati³

et al. 2011

European Journal of Cardio-Thoracic Surgery

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Objective The effect of seasonal variation on postoperative outcomes following lung cancer resections is unknown. We hypothesized that postoperative outcomes following surgical resection for lung cancer within the United States would not be impacted by operative season. Methods From 2002 to 2007, 182 507 isolated lung cancer resections (lobectomy (n = 147 937), sublobar resection (n = 21 650), and pneumonectomy (n = 13 916)) were evaluated using the Nationwide Inpatient Sample (NIS) database. Patients were stratified according to operative season: spring (n = 47 382), summer (n = 46 131), fall (n = 45 370) and winter (n = 43 624). Multivariate regression models were applied to assess the effect of operative season on adjusted postoperative outcomes. Results Patient co-morbidities and risk factors were similar despite the operative season. Lobectomy was the most common operation performed: spring (80.0%), summer (81.3%), fall (81.8%), and winter (81.1%). Lung cancer resections were more commonly performed at large, high-volume (>75th percentile operative volume) centers (P < 0.001). Unadjusted mortality was lowest during the spring (2.6%, P < 0.001) season compared with summer (3.1%), fall (3.0%) and winter (3.2%), while complications were most common in the fall (31.7%, P < 0.001). Hospital length of stay was longest for operations performed in the winter season (8.92 ± 0.11 days, P < 0.001). Importantly, multivariable logistic regression revealed that operative season was an independent predictor of in-hospital mortality (P < 0.001) and of postoperative complications (P < 0.001). Risk-adjusted odds of in-hospital mortality were increased for lung cancer resections occurring during all other seasons compared with those occurring in the spring. Conclusions Outcomes following surgical resection for lung cancer are independently influenced by time of year. Risk-adjusted in-hospital mortality and hospital length of stay were lowest during the spring season.

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Section: Discussionmentioning

confidence: 99%

Seasonal variation influences outcomes following lung cancer resections

LaPar¹,

Nagji²,

Bhamidipati³

et al. 2011

European Journal of Cardio-Thoracic Surgery

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“…In a canine model of myocardial infarction, there was a higher incidence of VA in winter. [154] In a study of 154 patients with ischemic heart disease (IHD), the incidence of ventricular tachycardia (VT) or ventricular fibrillation (VF) episodes was found to be higher in winter months and the lowest in summer, spring, and fall. A linear regression between the number of episodes and the average daily temperature showed a greater likelihood of the 2 events occurring on cooler days, irrespective of the cause of cardiac disease.…”

Section: Introductionmentioning

confidence: 99%

Winter cardiovascular diseases phenomenon

Fares¹

2013

North Am J Med Sci

167

161

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This paper review seasonal patterns across twelve cardiovascular diseases: Deep venous thrombosis, pulmonary embolism, aortic dissection and rupture, stroke, intracerebral hemorrhage, hypertension, heart failure, angina pectoris, myocardial infarction, sudden cardiac death, venricular arrythmia and atrial fibrillation, and discuss a possible cause of the occurrence of these diseases. There is a clear seasonal trend of cardiovascular diseases, with the highest incidence occurring during the colder winter months, which have been described in many countries. This phenomenon likely contributes to the numbers of deaths occurring in winter. The implications of this finding are important for testing the relative importance of the proposed mechanisms. Understanding the influence of season and other factors is essential when seeking to implement effective public health measures.

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“…In a canine model of myocardial infarction, there was a higher incidence of ventricular arrhythmias in winter 10 . Recent observational studies in the northern hemisphere conducted a follow-up of patients with an implantable cardioverter-defibrillator (ICD) and evaluated the seasonal distribution of shocks for the treatment of malignant ventricular arrhythmias.…”

Section: Discussionmentioning

confidence: 94%

Variação sazonal de episódios de taquicardia ventricular avaliados por Holter

Pimentel¹,

Grüdtner²,

Zimerman³

2006

Arq. Bras. Cardiol.

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objective: To evaluate the seasonal variation of ventricular arrhythmias and its correlation with ambient temperature in patients submitted to 24-hour Holter monitoring in the city of Porto Alegre, southern Brazil. Methods:Holter monitoring reports of 3,034 patients from 1996 to 2002 were analyzed. Ventricular tachycardia (VT) was defined as the presence of 3 or more consecutive ventricular beats, at a rate equal to or higher than 100 beats per minute.Percentage distribution of patients presenting VT by seasons and its correlation with ambient temperature were analyzed. results: Mean age was 59.2 ± 17.4 years, with a predominance of the female sex (61.9%). Patient distribution by season of the year was: 561 (18.5%) in summer, 756 (24.9%) in fall, 843 (27.8%) in winter and 874 (28.8%) in spring. Fifty-two patients (9.3%) presented VT episodes in summer, 39 (5.2%) in autumn, 56 (6.6%) in winter and 60 (6.9%) in spring (p = 0.035). There was a 40% relative increase in the proportion of patients presenting VT during summer in comparison to winter. There was a trend of increase in the proportion of patients presenting VT with rising temperatures (r = 0.57; p = 0.052). conclusion:The occurrence of VT presents seasonal variations in southern Brazil, with a higher proportion of episodes occurring in summer. There is an association trend between VT and temperature increase. In the last years, several studies have demonstrated a seasonal variation in the incidence of cardiovascular events, such as myocardial infarction, sudden death, ventricular arrhythmias and stroke [1][2][3][4]

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Seasonal variation in sudden cardiac death after experimental myocardial infarction

Cited by 18 publications

References 12 publications

Seasonal variation influences outcomes following lung cancer resections

Seasonal variation influences outcomes following lung cancer resections

Winter cardiovascular diseases phenomenon

Variação sazonal de episódios de taquicardia ventricular avaliados por Holter

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