INTRINSIC AMPLITUDE

what is INTRINSIC AMPLITUDE??
atrial ??
R VENTRICULAR ??

WHAT IS OHMS??

4 Comments

asfasfsaf

by boxxed - 2012-09-18 07:09:31

Intrinsic Amplitude is the size of the signals of your own heart activity. If the leads are in a good position, your top and bottom chamber contractions should give good signals. It's a measure to see how well the leads are sensing.

I don't know what you're asking about atrial and ventricular. Intrinsic atrial activity are called p-waves and intrinsic ventricular activity are called r-waves

Ohms is the unit of measurement for impedance/resistance. It's a measurement used to determine general lead integrity. Very low impedance 1500 ohms, and you could potentially have a lead fracture. Big fluctuations in ohms (impedance) is paid attention to.

Ohms

by ElectricFrank - 2012-09-19 01:09:32

There are actually several places on the report where the measurement is in ohms.

Battery Impedance: Relates to the internal state of the battery. This together with voltage is used to track the remaining life of the battery. The impedance continues to rise slowly as the battery ages.

Atrial & ventricular lead impedance: As boxxed mentioned they are a measurement of the condition of the pacing leads and electrodes. The actual numbers depend on the type of electrode and the condition of the heart wall. My medtronic leads show 701 ohms for atrial, and 392 ohms for ventricular. They have been the same since my implant in 2004. The report lists a range of 200 to 2000 ohms before a warning is triggered. These are the readings that can be the most helpful if there is a question of damaged or dislodged leads.

Moral of the story: Never ask an engineer. (:

cheers,
frank

Ohms

by SUPERSALE - 2012-09-19 11:09:33

Here is my Ohms 543

Looks normal

by ElectricFrank - 2012-09-20 12:09:13

The thing to watch is any changes. Small changes are also normal. What's small? Hard to say. At one point mine went up to 525 from 390 in a short time. At the same time my pacing voltage requirement went up and I had a big increase in PVC's. I had some sort of virus that was causing changes in my heart wall. Fortunately, by the next checkup all was back to normal. If the trend had continued it would have been an indication of a possible problem. The fact that it was able to return to my normal gave me a pretty good idea that it wasn't a dislodged lead. Lead don't reinsert themselves in the heart wall.

frank

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