High-Intensity Interval Training in Patients with Pulmonary Embolism: A Randomized Controlled Trial

Area of Science:

• Cardiology
• Pulmonology
• Exercise Physiology

Background:

• High-intensity interval training (HIIT) is effective for cardiovascular diseases.
• Limited data exists on HIIT's effects in acute pulmonary embolism (PE) patients.

Purpose of the Study:

• To examine the efficiency and safety of HIIT in patients recently discharged with acute PE.
• To assess HIIT's impact on exercise capacity, lung function, right ventricular function, and quality of life.

Main Methods:

• A single-center, parallel-group, open-label randomized controlled trial (RCT).
• 24 intermediate-high-risk acute PE patients were randomized to supervised HIIT (n=12) or control (n=12).
• Primary outcomes included estimated maximal oxygen uptake (eV˙O2max), lung function (FEV1), right ventricular (RV) function (RV/LV ratio), and HRQoL.

Main Results:

• Eight weeks of HIIT significantly improved eV˙O2max (+65%), FEV1 (+17%), RV/LV ratio (-27%), and HRQoL (P < 0.05 for all).
• HIIT was well-tolerated with no serious adverse events.
• The control group showed no improvement in eV˙O2max, RV/LV ratio, or HRQoL, with a slight decrease in FEV1.

Conclusions:

• Tailored HIIT intervention shows preliminary evidence of improving exercise capacity, lung function, RV function, and HRQoL in acute PE patients.
• HIIT appears safe and offers potential clinical benefits post-PE.
• Larger, multicenter RCTs are needed to confirm these findings.