📄 What really happens to myocardial performance during exercise in heart failure?

📄 What really happens to myocardial performance during exercise in heart failure? 🔗 🫀 Exercise stress echocardiography (ESE) is widely used… 👉 but traditional metrics (LVEF, GLS) are load-dependent ➡️ especially unreliable during stress ✨ This study explores a more advanced tool: 👉 Myocardial Work (MyW) analysis (based on pressure–strain loops) 🔬 Study design (MyStress Pilot): 👥 24 subjects ✔ 6 HFrEF ✔ 6 HFpEF ✔ 12 healthy controls 🚴 Semi-supine exercise echo up to 75 W 📊 Key parameters: ✔ GWI (global work index) ✔ GCW (constructive work) ✔ GWW (wasted work) ✔ GWE (efficiency) 📊 Key findings: 🔥 Controls: ✔ Strong increase in GCW & GWI with exercise ➡️ Normal contractile reserve ⚠️ HFrEF: ❌ Minimal/no increase in GCW & GWI ➡️ Absent contractile reserve ⚠️ HFpEF: ⚡ Blunted increase in GCW ❗ Significant increase in GWW ➡️ Inefficient myocardial work 📉 Importantly: 👉 Blood pressure response was similar across groups ➡️ Differences are intrinsic myocardial dysfunction, not just afterload 📈 The graphical abstract (page 2) highlights: ✔ Distinct exercise patterns ✔ Clear separation between HF phenotypes 🧠 Why this matters: 👉 HFpEF is notoriously difficult to diagnose ❗ Often normal at rest ➡️ MyW during stress: ✔ Unmasks diastolic dysfunction ✔ Reveals inefficient energy use 🚀 Clinical implications: 👉 MyW adds value beyond conventional ESE ✔ Better phenotyping of HF ✔ Improved detection of early dysfunction ✔ Potential for personalized risk stratification ⚠️ Take-home message: 🧩 Not all heart failure behaves the same under stress. 👉 Myocardial Work analysis reveals: ✔ “weak heart” (HFrEF) ✔ vs “inefficient heart” (HFpEF) ➡️ A new dimension in stress echocardiography #Cardiology #HeartFailure #Echocardiography #StressEcho #MyocardialWork #HFpEF #HFrEF #CardiacImaging #PrecisionMedicine 🫀📊