I Had An ECG Done And Am Not Sure What

I had an ECG done and am not sure what any of the readings, even with Dr.'s explanation, mean. An "ECG For Dummies" explanation would be appreciated.

Component     Your Value     Standard Range     Flag
Ventricular Rate     49 BPM     BPM     
Atrial Rate     49 BPM     BPM     
P-R Interval     180 ms     ms     
QRS Duration     104 ms     ms     
Q-T Interval     478 ms     ms     
QTC Calculation(Bezet)     431 ms     ms     
P Axis     24 degrees     degrees     
R Axis     -10 degrees     degrees     
T Axis     30 degrees     degrees     
Diagnosis     Marked sinus bradycardia            
Diagnosis     Inferior infarct , age undetermined            
Diagnosis     Nonspecific T wave abnormality            
Diagnosis     Abnormal ECG            
Diagnosis     When compared with ECG of 14-DEC-2016 12:22,            
Diagnosis     No significant change was found