t_macs_decision_aid: Troponin-only Manchester Acute Coronary Syndromes (T-MACS)...

In cliot: Clinical Indices and Outcomes Tools

Troponin-only Manchester Acute Coronary Syndromes (T-MACS) Decision Aid

Description

Calculates the probability of Acute Coronary Syndrome (ACS) using the T-MACS decision aid. This tool incorporates high-sensitivity cardiac troponin T (hs-cTnT), Heart-type Fatty Acid Binding Protein (H-FABP), ECG findings, and clinical symptoms to risk-stratify patients presenting with chest pain. Note: While the original MACS rule included H-FABP, the T-MACS variation typically relies on hs-cTnT alone or in combination; this function implements the full multivariable model as described in the primary derivation study which included H-FABP.

Usage

t_macs_decision_aid(hs_ctn_t_ng_l, heart_type_fatty_acid_binding_protein_ng_ml,
                    ecg_ischemia, sweating, pain_radiates_to_right_arm_shoulder,
                    pain_worsens_with_movement_palpation, vomiting)

Arguments

hs_ctn_t_ng_l	Numeric. High-sensitivity cardiac troponin T level in ng/L.
heart_type_fatty_acid_binding_protein_ng_ml	Numeric. Heart-type Fatty Acid Binding Protein (H-FABP) level in ng/mL.
ecg_ischemia	Numeric (0 or 1). Evidence of ischemia on ECG (ST depression, T-wave inversion). (1 = Yes).
sweating	Numeric (0 or 1). Observed sweating. (1 = Yes).
pain_radiates_to_right_arm_shoulder	Numeric (0 or 1). Pain radiates to the right arm or shoulder. (1 = Yes).
pain_worsens_with_movement_palpation	Numeric (0 or 1). Pain worsens with movement or palpation. (1 = Yes).
vomiting	Numeric (0 or 1). Associated vomiting. (1 = Yes).

Value

A list containing:

Probability_ACS	The calculated probability of ACS.
Risk_Category	Risk stratification (Very Low, Low, Moderate, High).

References

Body R, et al. The Manchester Acute Coronary Syndromes (MACS) decision rule for suspected cardiac chest pain: derivation and external validation. Heart. 2014;100(18):1462-1468. doi:10.1136/heartjnl-2014-305564 Body R, et al. A rapid rule-out for acute coronary syndromes using a single high-sensitivity cardiac troponin T measurement: the T-MACS decision aid.

Examples

# Example 1: High Risk
# hs-cTnT 50, H-FABP 6, ECG Ischemia, Sweating
# Log-odds calculation leads to high probability
t_macs_decision_aid(50, 6, 1, 1, 0, 0, 0)

# Example 2: Very Low Risk
# hs-cTnT 3, H-FABP 1.5, No symptoms
t_macs_decision_aid(3, 1.5, 0, 0, 0, 0, 0)

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