Take the D scale for example. Start on the D note at the second fret and move up the scale like this to the next D: If you play this same pattern up two frets (so the E is the first note you play), youâll have an E major scale. The same goes for any other pattern you can spot in these scale maps.
A pacemaker signals the heart to beat when the heartbeat is too slow or irregular. A pulse generator is a small metal case that contains electronic circuitry with a small computer and a battery that regulate the impulses sent to the heart.
The leads are attached to the pacemaker or defibrillator under the skin, and the cut is stitched closed. When a defibrillator is put in, the surgeons test the device to make sure that it will work when needed. To do this, the surgeon puts the patientâs heart into the abnormal rhythm while closely monitoring them.