The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Edward Bender:
Heart Chart is a great tool for the practicing or training cardiac surgeon. With nothing but your finger, draw bypass grafts, repair and replace valves, and make a record of all the other operations you do as a heart surgeon. Share the drawings with your colleagues, referring physicians, your students, and even your patients. Save the drawings on your iPad or on your Dropbox account. Print out Heart Chart for the medical record or as a record of your operative cases.Note that this software is designed for the medical professional. Although non-healthcare personnel may download Heart Chart, they will probably get bored with it (unless they take up heart surgery).