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.
Treatment Overview. A pacemaker is a small battery-powered device that sends weak electrical impulses to set a pace so that the heart is able to keep a regular heartbeat. There are different types of pacemakers, so your doctor will work with you to decide what kind will be best for you.