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What is the flat line on an ecg called?
isoelectric lines!
Why use P Q R S T on the ECG?
Willem Einthoven invented the ECG in 1903. The letters P Q R S T were assigned to the points on the ECG because it was thought that there may be more points in either direction to be found. The letters remained in use out of common practice even after it was determined there were no further points to be labelled.
What is the isoelectric line of the ECG?
An isoelectric line on the electrocardiograph is the base line on an electrocardiogram.
What confounding variables can interfere with an ECG?
jewlrey, medications, movement, lead placement, metal buttons,
What is atrial repolarization indicated by?
The atrial repolarization occurs during the QRS complex of the ECG but is obscured by the ventricle depolarization.
What is R-R interval in an ECG?
the time between the two R waves in ECG
Why does RR interval of ECG vary during normal respiration?
The RR interval of ECG vary during normal respiration because of the sinus arrhythmia.
In an ECG pattern the P-Q interval indicates how long it takes for the cardiac impulse to travel from the?
An ECG pattern the P-Q interval indicates how long it takes for the cardiac impulse to travel from the SA node through the AV node.
How do you calculate QTcF interval on an ECG?
(QT/ RR^(1/3))*10
What does a long QT interval on ECG mean?
It is a lengthening of the amount of time between depolarization of the ventricles of the heart, and the repolarization of the ventricles of the heart. The significance of this lies in the fact that the Q-T interval is a vulnerable time for the heart. Stimulation of the heart muscle during the relative refractory period (which is during the latter part of the Q-T interval) will cause a premature ventricular contraction, which may throw your heart into a dangerous dysrhythmia.
What would be a patients ecg show with Hypocalcemia?
The ECG of a patient with hypocalcemia will show q number of different distinct patterns. The ECG will show a T wave that is inverted and flattened, a prolongation of the QT interval, a narrowing of the QRS complex, a prolonged ST and ST depression, a reduction in the PR interval, and a prominent U wave.
What part of the ECG tracing represents the time from the start of the atrial activity to the start of ventricular activity?
QT interval
What is the normal range for R-R interval on an ECG?
Between 0.6 (100bpm) and 1 second (60bpm).
Is 1.5 rr interval normal on ecg?
If the RR of 1.5 is in seconds, it is outside the normal range of 0.6 - 1 second
What would cause you to believe that someone has a heart murmur?
irregular ecg
What is the cause for smeared trace of ECG machine?
LEAD DISPLACEMENT
Why does hypocalcemia prolong the QT interval If calcium influx is compromised by hypocalcemia how is the isoelectric plateau phase maintained much less prolonged as manifested by the ECG?
more potassium
