US D429336 S
FIG. 1 is a front perspective view from above and to one side of a heart monitoring device of our new design;
FIG. 2 is a rear perspective view thereof from below and to one side;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a side view thereof; and,
FIG. 6 is a front perspective view thereof from above and to one side showing the casing of the heart monitoring device in an open position.