r/askCardiology • u/Ok_Hand_8257 • 2h ago
Test Results Long-term exercise intolerance, shortness of breath and tachycardia despite normal ECGs and echocardiograms
I'm a 20-year-old male and have experienced exercise intolerance since 2018. When lifting weights or exercising, my heart rate rises rapidly, and I experience shortness of breath, sometimes so intense that I feel like I'm going to die.
However, exercise isn't the only trigger. These symptoms also occur without physical activity and can persist for weeks, sometimes disappearing for months before returning.
I've had three ECGs, two echocardiograms and blood tests, all reportedly normal except for one ECG showing sinus tachycardia. My heart rate during the ECGs was around 140–160 bpm. A cardiologist and a general physician reassured me that my heart was normal, and one suggested generalized anxiety disorder (GAD).
I understand anxiety can cause physical symptoms, but can it really explain long-term exercise intolerance and episodes of tachycardia and shortness of breath that last for weeks? Can underlying problems still exist despite normal ECGs and echocardiograms?
I'd appreciate hearing from anyone who's experienced something similar.