European Primary Care Cardiovascular Society

Higher alcohol intake in young adults related to long-term adverse cardiac remodeling

Association Between Alcohol Intake and Cardiac Remodeling

Literature - Rodrigues P, Santos-Ribeiro S, Teodoro T et al. - JACC 2018; published online ahead of print, DOI: 10.1016/j.jacc.2018.07.050

Introduction and methods

Alcohol abuse is a known risk factor for alcoholic cardiomyopathy. Alcohol intake is shown to be associated with subtle echocardiographic changes in cardiac morphology and systolic/diastolic function, mostly in cross-sectional or short follow-up studies in middle-aged and older individuals [1,2]. However, the long-term effect of alcohol consumption in young adults on cardiac remodeling remains unknown and information about the impact of other patient characteristics or the pattern of alcohol consumption regarding the threshold level of being injurious seems to be controversial. Therefore, this study aimed to assess the potential cardiotoxic role of alcohol in cardiac structure and function in the long-term in young adults into middle age, with a focus on specific types of alcoholic beverages.

The Coronary Artery Risk Development in Young Adults (CARDIA) cohort study recruited 5,115 individuals aged 18-30 years who have been followed for >30 years and have undergone a series of questionnaires and examinations on alcohol consumption, with year 5 as baseline period (because it was the first year ECG evaluations were performed). Individuals with known heart disease or a left ventricular ejection fraction (LVEF) <55% at baseline, or with insufficient information about the echocardiographic outcomes or alcohol habits were excluded, leaving a study sample of 2,368 participants.

Self-reported data on past drinking habits and the number of drinks of wine, beer and liquor typically consumed per week were obtained from a questionnaire filled in at years 5, 15 and 25. Alcohol intake was categorized by calculated average alcohol consumption per week: no alcohol consumption, average consumption (>0 and <4 drinks), ≥4 and <7 drinks, ≥7 and <14 drinks, and ≥14 drinks per week. Cumulative alcohol intake during 20 years of follow-up was calculated, based on reported alcohol intake and total time interval.

The primary endpoint was LVEF and secondary endpoints were body surface area (BSA)-indexed left ventricular end-diastolic volume (LVEDV), BSA-indexed left ventricular (LV) mass and left atrial (LA) diameter. These endpoints were assessed by transthoracic echocardiography.

Main results

Baseline characteristics

LVEF, LVEDV, LV mass and LA diameter

Effect modification of sex and race

Type of beverage and binge drinking

Conclusion

Greater alcohol intake in young adults had an independent adverse association with ventricular structure after 20 years of follow-up, which was not significantly modified by sex or race. Alcohol intake was also associated with LA diameter in women and among African American young adults, but it was not associated with LVEF in young adults with mild-to-moderate alcohol consumption. Binge-drinking had a non-significantly deleterious effect on cardiac remodeling and predominantly drinking wine was associated with less cardiac remodeling.

Editorial comment

In their editorial comment [3], Fauchier et al. note that the results of Rodrigues et al. reinforce the opinion that mild alcohol consumption is not associated with a major CV risk in healthy subjects and these data suggest that drinking predominantly wine may be associated with less deleterious effects in cardiac structure. However, they also mention the main limitations of the current study, which are: the lack of information on genetic factors that may play a role in alcoholic cardiomyopathy, analysis on intraindividual association of alcohol intake and echocardiographic measures at each point for years 5, 15 and 25 since drinking habits can vary over 20 years, but also a variation analysis on binge-drinking since alcohol abstinence is associated with improved prognosis in patients with alcoholic cardiomyopathy. The authors conclude: ‘There are still considerable knowledge gaps about how alcohol in combination with other factors may affect incidence of alcoholic cardiomyopathy and prognosis in HF patients. Both observational real-life analyses and interventional trials are still needed to improve the clinical management in these patients’.

References

Show references

Find this article online at JACC

Share this page with your colleagues and friends: