@parsureshkumar,
The JSFiddle shared shows how you can achieve ECG graph using CanvasJS charts, which you can further customize as per your requirements. Here is the updated JSFiddle showing 5*5 graph with minor-grids.
You can customize the thickness of gridlines using gridThickness, dataSeries line using lineThickness, stripLine using thickness properties.
—
Vishwas R
Team CanvasJS