I've been experiencing something concerning that Id like some input on. So, last week, I had this issue but after taking some medication, it seemed to go away. However, Ive been noticing that whenever I lift weights around 25kg, I get this tight feeling in my chest. Along with that, my heart seems to race really fast. When I used my mobile to check my heart rate, the numbers were all over the place like 104, 96, 87, 45, and 79 which seemed off. At first, I thought maybe the phone sensor was acting up, but it reads other people's heart rates accurately. In the mornings, my heart rate seems stable, usually between 65 and 76, but it gets weird in the afternoon and evening. Ive had an ECG, 2D echo, and blood tests done, and my doctor says everything is normal with my heart. Is it possible for there to be issues even if those tests show normal results? I'd appreciate any insight.

Based on your symptoms, it sounds like you may be experiencing episodes of arrhythmia, which are abnormalities in the heart's rhythm. One common type of arrhythmia is atrial fibrillation, which can cause symptoms like fast or irregular heartbeats. I recommend discussing with your doctor about the possibility of wearing a Holter monitor for 24-48 hours to capture your heart's rhythm during your daily activities. This can help in identifying any intermittent arrhythmias that may not be captured during a standard ECG. In terms of management, if significant arrhythmias are detected, your doctor may prescribe medications such as beta-blockers or anti-arrhythmic drugs to help control your heart rate and rhythm. Lifestyle modifications such as reducing stress, avoiding stimulants like caffeine, and maintaining a healthy weight can also be beneficial. It's important to follow up with your doctor regularly and keep track of your symptoms. If you experience any chest pain, severe shortness of breath, fainting, or dizziness, seek immediate medical attention.