Abbott CRT-D vs Medtronic TriageHF – Discussion
Summary
Abbott (St. Jude) CRT-D Heart Failure Diagnostics
Available diagnostics in modern Abbott CRT-D systems may include: CorVue thoracic impedance
(fluid status trend), patient activity trends, AF/AT burden, ventricular rate during AF, CRT pacing
percentage, lead impedance trends, day/night heart rate trends, VT/VF episodes, and remote
monitoring through Merlin.
CorVue Thoracic Impedance
CorVue monitors intrathoracic impedance. A sustained decrease in impedance may suggest
increasing pulmonary congestion and worsening heart failure.
Medtronic TriageHF
TriageHF is an integrated heart-failure risk prediction algorithm used in compatible Medtronic
ICD/CRT devices.
Inputs include thoracic impedance (OptiVol), patient activity, AF burden, ventricular rate during AF,
CRT pacing percentage, VT/VF episodes, ICD therapies/shocks, night heart rate, and heart rate
variability.
Risk Categories
Low Risk, Medium Risk, and High Risk. High-risk patients have substantially higher risk of
heart-failure hospitalization within the following 30 days.
Numerical Score?
Clinicians are generally shown a risk category (Low/Medium/High) rather than a continuous
numerical score. The underlying algorithm uses a probabilistic model, but routine reports focus on
risk stratification and contributing trends.
Key Difference
Abbott devices provide multiple individual heart-failure diagnostics, whereas Medtronic TriageHF
integrates several diagnostics into a single actionable heart-failure risk status.
