With an interval measurement
, however, there are two degrees of freedom: the measurements of one and the other border of the interval.
There are two major issues with respect to QT interval measurement
, aside from problems with estimating the end of the T wave.
 Hayn, D., Kollmann, A., & Schreier, G., "Automated QT interval measurement
from multilead ECG signals", Computers in Cardiology, 381-384, IEEE, 2006.
QTc interval measurement
and metabolic parameters in psychiatric patients taking typical or atypical antipsychotic drugs: A preliminary study.
Issues in QT interval measurement
. Indian Pacing and Electrophysiology Journal 2004; 4(4): 156-61
Third, the promise of reference interval measurement
in support of clinical measurement has been practically realized for some applications and is feasible for others.
As can be seen from Table 2, the time interval measurement
was most stable using the algorithms of the first and second order derivatives of the waves peaks, although as observed in Table 3, the average values were significantly different (t = 7.5, p <0.001).
It is defined as sound pressure level of continuous steady sound that within a time interval measurement
t=[t.sub.2]-[t.sub.1], has the same mean square sound pressure as a reference sound, which varies over time.
Importance of lead selection in QT interval measurement
. Am J Cardiol 1988; 61:83-87.
In this article, the author will identify the practice gap that exists among nurses regarding QT interval measurement
, discuss contributing factors that potentially prolong the QT interval, and detail two methods used to measure the QT interval.
QT Interval Measurement
: Controlling for Physiologic Variables
The PS01 determines resistor ratio from a highly precise time interval measurement
, done with a resolution of 14 ps, which corresponds to a respectable 70 GHz for a counter.