How is smoking related to atrial fibrillation?

01

New AF is different from a rhythm symptom

A prospective-study meta-analysis found an association between current smoking and incident AF, not proof that smoking caused an individual's AF.

Incident AF, existing AF, palpitations, other arrhythmias, stroke, heart failure and coronary disease are different endpoints.

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02

Smoking categories and other risk factors

Reported dose trends depend on cigarettes, duration and current/former/never categories; heterogeneity prevents a universal multiplier.

Age, alcohol, blood pressure, body composition, lung disease, ascertainment and quitting after illness can shape estimates.

[1][2]

03

Check who is included in the reference group

The 2018 review included 29 prospective studies overall, but fewer informed each comparison. “Current versus never” excludes former smokers from the reference group; “current versus non-current” can include them. These comparisons do not mean the same thing. Dose analyses also drew on fewer studies than the overall review. Neither a pooled association nor a dose trend turns a watch alert into AF, or proves what happens to established AF after someone stops smoking.

[1]

04

A question for a qualified rhythm service

Ask whether an article concerns first AF diagnosis, episodes in people already diagnosed, or a different cardiovascular outcome. Individual pulse or ECG findings need clinical interpretation. General public tobacco information supplies support options, not an anticoagulation or rhythm-treatment decision.

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