Protein-based cardiogenic shock patient classifier.

Area of Science:

• Cardiovascular Medicine
• Proteomics
• Biomarker Discovery

Background:

• Cardiogenic shock (CS) has a high short-term mortality rate.
• Accurate risk stratification is crucial for guiding interventions and improving patient outcomes in CS.

Purpose of the Study:

• To develop and validate a circulating protein-based score for predicting short-term mortality in patients with CS.
• To assess the performance of the novel score alone and in combination with existing risk scores.

Main Methods:

• Mass spectrometry was used for initial protein screening in a discovery cohort.
• Targeted quantitative proteomics identified and validated a classifier in an independent cohort.
• The classifier, Cardiogenic Shock 4 proteins (CS4P), comprises four specific circulating proteins.

Main Results:

• The CS4P classifier demonstrated significant discrimination between low and high 90-day mortality risk groups.
• Combining CS4P with the CardShock risk score improved predictive accuracy (C-statistic 0.84) and reclassification (NRI 0.49).
• Similar improvements were observed when CS4P was combined with the IABP-SHOCK II risk score (NRI 0.57).

Conclusions:

• The CS4P is a novel, validated protein-based classifier for short-term mortality risk stratification in CS patients.
• CS4P enhances the predictive power of existing risk scores, aiding clinical decision-making for advanced therapies.