The Study
Autonomic influences related to frequent ventricular premature beats in patients without structural heart disease
This study looked at 20 people who had lots of extra heartbeats and found that when their heart rate slowed down, they had more extra beats. But it didn't prove that the slowing heart rate caused the extra beats—it just noticed they happened together.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Some people feel their heart skip beats even when their heart is healthy. This study found that when these people are more relaxed (higher vagal tone), their heart skips more often — not when they're stressed.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 534 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This means calming down or resting might make skipped beats worse for some people — so treating them with stress-reducing drugs like beta-blockers may not help and could be unnecessary.
- 2In people with over 8,000 skipped beats a day, higher vagal tone (measured by rMSSD) was linked to even more skipped beats — with a strong correlation (r=0.65).
- 3No link was found with overall heart rate variability.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Medicine
Year
2018
Authors
A. Frigy, E. Csiki, C. Carașcă, I. Szabó, V. Moga
Related Content
Claims (6)
In people without structural heart disease, heart palpitations occur due to an imbalance between the nervous system pathways that speed up and slow down the heart.
People with frequent irregular heartbeats show changes in nerve signals that slow the heart, but their overall heart rate variability remains unchanged, meaning the effect is specific to the parasympathetic nervous system and not the entire autonomic system.
In people with frequent extra heartbeats and no underlying heart damage, starting beta-blocker medication is not supported by evidence because the pattern of heartbeats is linked to vagal nerve activity, not overactive sympathetic signaling.
In adults without heart structure problems who have many extra heartbeats, higher activity of the vagus nerve is linked to more frequent extra heartbeats, especially when the total exceeds 8000 per day.
In adults without structural heart disease, the frequency of ventricular premature beats does not vary significantly between daytime, evening, and nighttime hours.
In people without structural heart disease, a higher number of extra heartbeats per day is linked to higher vagal nerve activity, measured by heart rate variability, compared to those with fewer extra beats.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.