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Gene study (Mendelian randomization)

Gene study using public gene databases: no clear link between drinking and irregular heartbeat

Ye and colleagues · Cardiovascular toxicology · 2025

Original title: Smoking, Alcohol Consumption, and Atrial Fibrillation: Mendelian Randomization Study.

Under review. A person has not yet checked this summary against the paper. It is written from the PubMed abstract. Until a person checks it, search engines are asked not to list this page.

What the study found

No difference

No causal link was found between alcohol drinking measures and atrial fibrillation. Smoking did show a link (current smoking OR: 1.413, 95% CI = 1.058-1.888).

The study at a glance

Type of study
Gene study (Mendelian randomization)
Who or what was studied
people in public gene databases
What was tested
Gene-predicted alcohol use and drinking frequency vs risk of atrial fibrillation, alongside smoking
What it measured
The question itself: heart disease and death
Who has a stake
No stake declared
Authors declare no commercial or financial relationships.
Journal
Cardiovascular toxicology, 2025
Source
PubMed record 39987412. This page is based on the abstract only.

How much this study counts

  • •A gene study: it uses natural gene differences as a kind of experiment. It is less affected by lifestyle than surveys, but it rests on assumptions that can fail.
  • •The abstract does not say how many people took part.
  • ✓Measured the question itself: heart disease and death.
  • ✓No competing interests declared.
  • •Summarized from the PubMed abstract only. The full paper may hold details the abstract leaves out.

✓ Strength– Limit• Note

These points come from fixed rules about the type of study, its size and length, what it measured, and who has a stake. Every study on Digestery gets the same rules.

Where this study sits

Each dot is one on-topic paper on this question. Steps near the top answer the question more directly.

↑ Stronger evidence

  1. Trials in people: heart disease

    0

    Not done yet. This is the step that would answer the question.

  2. Trials in people: other measures

    0

    None among the papers we read.

  3. Trials in people: lab tests or safety

    0

    None among the papers we read.

  4. Population studies

    5

    3 benefit, 1 mixed, 1 harm

  5. Blood levels and genes

    6

    1 mixed, 2 no difference, 3 harm

    ↑ This study is the ringed dot

↓ Weaker evidence

  • Points to benefit
  • Mixed
  • No difference
  • No direction
  • Points to harm

How it fits with the other research

The short answer to “Is moderate drinking good or bad for your heart?”

Not shown to help; may harm.

Confidence: very low. Based on 21 on-topic papers.

Read the full answer

Of the other 5 papers on the same step: 1 mixed, 1 no difference, 3 harm. This one found no difference. It differs from most of them.

  • Open item for a person: Ye 2025 studies alcohol use diagnosis and drinking frequency, not moderate drinking, with heart rhythm outcome; kept relevant. Confirm.

Other papers on the same step

See all 21 studies on this question

How this page was made

Label

First read of the abstract
Claude Sonnet
Independent second read
Claude Haiku
Differences settled
The two reads agreed on every checked field. Claude Opus 5.5.
Headline
Claude Sonnet, from the checked study record. A script checked its numbers and wording.
Numbers
Checked against the abstract by a script
“How much this study counts”
Fixed rules, the same for every study
Source check by a person
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