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.
Your doctor has recommended a pacemaker because there are signs that your heart is not beating fast enough or there is a problem with the normal electrical signal which causes your heart to beat. A pacemaker is composed of three parts: a pulse generator, one or more leads, and an electrode on each lead.