A PP interval of 685 ms refers to the time between two consecutive P waves in an electrocardiogram (ECG), which represents the time between atrial depolarizations. This interval can provide information about the heart's rhythm and conduction system. A PP interval of 685 ms corresponds to a heart rate of approximately 88 beats per minute (bpm), which is within the normal range for resting heart rates. Abnormalities in the PP interval may indicate various cardiac conditions that require further evaluation.
isoelectric lines!
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.
An isoelectric line on the electrocardiograph is the base line on an electrocardiogram.
jewlrey, medications, movement, lead placement, metal buttons,
the time between the two R waves in ECG
The RR interval of ECG vary during normal respiration because of the sinus arrhythmia.
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.
(QT/ RR^(1/3))*10
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.
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.
The RR interval in ECG readings represents the time between two consecutive heartbeats. It is significant because it can provide information about the heart's electrical activity, heart rate variability, and overall cardiac health. Abnormalities in the RR interval can indicate potential heart conditions or issues with the heart's conduction system.
Between 0.6 (100bpm) and 1 second (60bpm).
QT interval
Adrenaline increases heart rate and conduction velocity in the heart, which can lead to changes in the ECG. These changes may include a shortening of the PR interval, widening of the QRS complex, and an increase in heart rate.
If the RR of 1.5 is in seconds, it is outside the normal range of 0.6 - 1 second
To measure the S-P interval, you would first identify the onset of the S wave and the onset of the subsequent P wave on an electrocardiogram (ECG) tracing. Then, you would determine the time interval between these two points, typically using calipers or measuring tools available on ECG machines. The S-P interval represents the time it takes for electrical stimuli to travel from the AV node to the Purkinje fibers in the heart.