brugada_criteria_vt: Brugada Criteria for Ventricular Tachycardia

In cliot: Clinical Indices and Outcomes Tools

Brugada Criteria for Ventricular Tachycardia

Description

Implements the Brugada Algorithm to differentiate Ventricular Tachycardia (VT) from Supraventricular Tachycardia (SVT) with aberrancy in patients with wide complex tachycardia. The algorithm follows a four-step sequential evaluation. If any step is positive, the diagnosis is VT. If all steps are negative, the diagnosis defaults to SVT with aberrancy.

Usage

brugada_criteria_vt(absent_rs_precordial, rs_interval_gt_100,
                    av_dissociation, morphology_criteria_vt)

Arguments

absent_rs_precordial	Numeric (0 or 1). Step 1: Is there an absence of an RS complex in ALL precordial leads? (1 = Yes -> VT).
rs_interval_gt_100	Numeric (0 or 1). Step 2: Is the RS interval (onset of R to nadir of S) > 100 ms in ANY precordial lead? (1 = Yes -> VT).
av_dissociation	Numeric (0 or 1). Step 3: Is there AV dissociation? (1 = Yes -> VT).
morphology_criteria_vt	Numeric (0 or 1). Step 4: Are morphology criteria for VT present in leads V1-2 and V6? (1 = Yes -> VT).

Value

A list containing:

Diagnosis	"Ventricular Tachycardia (VT)" or "SVT with Aberrancy".
Step_Positive	The step number (1-4) that confirmed VT, or 0 if SVT.

References

Brugada P, Brugada J, Mont L, Smeets J, Andries EW. A new approach to the differential diagnosis of a regular tachycardia with a wide QRS complex. Circulation. 1991;83(5):1649-1659. doi:10.1161/01.cir.83.5.1649

Examples

# Example 1: VT diagnosed at Step 2
# RS complex present (0), but RS interval > 100ms (1)
brugada_criteria_vt(0, 1, 0, 0)

# Example 2: SVT with Aberrancy
# All criteria negative
brugada_criteria_vt(0, 0, 0, 0)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.