Key Terms
represents one complete heartbeat
Cardiac Cycle
fifth intercostal space at junction of left midclavicular line
V4
a _____ consists of a P wave, QRS complex, and a T wave.
Normal ECG cycles
Represents the time interval from the end of the atrial depolarization to the beginning of the ventricular depolarization
PR Segment
normal paper speed
25 mm/sec
term used to describe abnormal electrical activity in the heart causing an irregular heartbeat
Dysrhythmia
midway between positions 2 and 4
V3
represents the electrical activity associated with the contraction of the atria, or atrial depolarization.
P wave
represents the time interval from the end of the ventricular depolarization to the beginning of repolarization of the ventricles
ST segment
a simple, noninvasive screening test that is often performed in the medical office.
Spirometry
Composed of substance that is a good conductor of electricity
Electrodes
fourth intercostal space at right margin of sternum
V1
represents the electrical activity associated with the contraction of the ventricles, or ventricular depolarization.
QRS Complex
represents the time interval from the beginning of the atrial depolarization the the beginning of the ventricular depolarization
PR interval
portable hand held, manual or digital, device used to measure breathing maneuver performed by a patients
Peak Flow Meter
structures that sometimes appear in the recording that are not natural and interfere with the normal appearance of the ECG cycles
Artifacts
at horizontal level of position 4 at left midaxillary line
V6
represents the electrical recovery of the ventricle, or ventricular re-polarization
T wave
is the time interval from the beginning of the ventricular depolarization to the end of re-polarization of the ventricles
QT interval
defined as a decrease the oxygen saturation of the blood.
Hypoxemia
a substance that facilitates the transmission of the hearts electrical impulse
electrolyte gel
at horizontal level position 4 at left anterior axillary line
V5
occasionally a _ ____ follows a T wave, it is a small ____ that is associated in some as yet a undefined way with repolarizaton of the Purkinje fibers.
U wave
sfter the T wave (or U wave if presents) represents the period when the entire heart returns to its resting, or polarized, state.
Baseline
Chronic lung disease that affects the smaller bronchi and the bronchioles of the lungs
Asthma