Ive been having trouble with my breathing, and my pulse rate is pretty high. My doctor mentioned something about sinus tachycardia and gave me propranolol to take. After using it for a couple of days, I've started to notice swelling in my fingers. What kind of tests or investigations do you think I should consider? And should I be worried about this swelling? Any advice would be really helpful.

Sinus tachycardia is a condition where the heart beats faster than normal. Since you are experiencing swelling on your fingers after taking propranolol, it is important to consult your doctor for a possible alternative medication. In terms of investigations, you may consider getting an ECG (Electrocardiogram) to monitor your heart's electrical activity and rule out any other underlying heart conditions. Additionally, a blood test to check electrolyte levels and thyroid function may be recommended. It is important to discuss these options with your healthcare provider for proper evaluation and management.