Method and apparatus for classifying and treating cardiac arrhythmias based on atrial and ventricular activity
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United States of America Patent
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Apr 28, 1992
Grant Date -
N/A
app pub date -
Nov 2, 1990
filing date -
Nov 2, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for classifying cardiac arrhythmias by examining the atrial and ventricular activity of the heart. The atrial contraction rate and ventricular contraction rate are compared with each other when the ventricular rate exceeds a preset value. When the atrial rate exceeds the ventricular rate, the regularity of the atrial rate, ventricular rate, and time interval between atrial contraction and ventricular contraction are determined. Regularity is determined by computing the standard deviation of a variable and comparing the standard deviation with a predetermined fractional value of the variable. A therapy routine is provided depending on the classification of a detected arrhythmia and the level of the ventricular contraction rate.
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