Post recovering from Covid in December 2020, my wife developed elevated heartbeat symptoms. During initial days, it would happen whenever she was startled or after waking up, mostly no fixed time when it would happen. Nowadays it happens mostly immediately after waking up and continues for quite long period of time. During this time, she gets pounding heartbeat which is audible clearly if listened to closely. ECG showed no irregularities but recorded 99bpm. She was advised Fludac 20mg and Lonazep Md (0.25) as SOS. The medicines didn't work out as far the condition goes. Please help.