The ornamental design for an electrocardiographicdevice, as shown and described.
1. Electrocardiographic device
Fig. 1.1 is a top front perspective view of an electrocardiographic device showing our new design; fig. 1.2 is a front view thereof; fig. 1.3 is a rear view thereof; fig. 1.4 is a left side view thereof; fig. 1.5 is a right side view thereof; fig. 1.6 is a top view thereof; fig. 1.7 is a bottom view thereof; and, fig. 1.8 is a bottom front perspective view thereof.
The broken lines shown in Figs 1.1-1.8 illustrate portions of the electrocardiographic device that form no part of the claimed design. The dot-dash lines shown in Figs 1.1 and 1.6-1.8 illustrate the bounds of the claim and form no part of the claimed design.