The Claim

Patients with vasovagal syncope classified as Type 2 (cardioinhibitory with or without asystole) exhibit lower baseline ICEB and ICEBc values than those classified as Type 1 or Type 3, indicating a greater degree of electrophysiological imbalance in Type 2.

Source: Index of cardiac electrophysiological balance in patients with vasovagal syncope confirmed by head-up tilt test

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
44score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Description
1 study reviewed
In plain English

In patients with vasovagal syncope, those with the Type 2 subtype have measurably lower baseline ICEB and ICEBc values than those with Type 1 or Type 3 subtypes, reflecting a more pronounced electrophysiological imbalance.

See the scientific wording

Among patients with vasovagal syncope, those classified as Type 2 (cardioinhibitory with or without asystole) have the lowest baseline ICEB and ICEBc values compared to Type 1 and Type 3 subtypes, indicating greater electrophysiological imbalance in this subgroup.

Why this might work

The heart's electrical recovery phase becomes too short because the vagus nerve is overly active, while the timing of the heart's main contraction stays the same. This creates an imbalance in the heart's electrical timing, making it more prone to sudden pauses.

Supported mechanismbased on 1 study

What the research says

1 study

  1. Study: Index of cardiac electrophysiological balance in patients with vasovagal syncope confirmed by head-up tilt test

    People who faint because their heart suddenly slows down (Type 2) had the most unbalanced heart electrical signals at rest, compared to other types of fainting, according to this study. This means their hearts are more electrically unstable even before they faint.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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