My father got bypass surgery in 2020. The reason of the surgery was bradycardia. His pulse decreased upto 35 HR. After surgery he get the same problem many times till now . One thing we observed that whenever his pulse decreases he have gastric problems along with that too. He feels gas coming upwards and we couldn't even talk properly on that time . When he gets this gas problem his systolic BP goes up and pulse goes low. When this gas problem solved then his all problems solved automatically. Now we don't understand what this problem is . We had all hi tests done . In ECHO the EF is 50 In ECG it was bradycardia