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.
A pacemaker is implanted under the skin, usually on the left side of the chest below the collarbone. The procedure takes about an hour, and most patients go home within a day. Types of pacemakers vary; some correct a slow heartbeat, while others stop an irregular heartbeat or stop severe heart failure.