Shortness of breath going up the staircase and difficulty breathing at night.
Need to sit on bed to ease breathing at night.
Unusual frequency of urinations at night.

Puffiness and edema of both feet.
Push the affected area with a finger for 10 seconds and release.
If the indentation does not improve for more than 40 sec, it may indicate the heart problem.  
Plus, weight gain due to the edema.
(Caution:  edema may happen if you take in too much salt.)
Unusual blood vessel protrusion in the neck, especially while you sit or stand.
Chronic left shoulder and neck tightness.
Left shoulder or neck pain shooting to left jar or left jar pain.
Also, consider fatigue and loss of appetite.