EKG basics
What is the name of the wave that represents atrial depolarization?
P wave
This rhythm is characterized by irregularly irregular R-R intervals and no discernible P waves.
Atrial fibrillation
What is the paper speed used for most standard EKGs.
25 mm/second
These leads are placed on the limbs and help create leads I, II, and III.
The limb leads
This condition is indicated by ST-segment elevation in two or more contiguous leads.
Myocardial Infarction
What is the number of electrodes typically used on a standard 12 lead EKG?
10
A sawtooth pattern of flutter waves suggests this arrhythmia.
Atrial Flutter
This lead is most useful for identifying atrial activity such as P waves.
Lead II
This precordial (chest) lead is placed in the 4th intercostal space at the right sternal border.
V1
This slow rhythm, often defined as less than 60 bpm, may be normal in athletes.
Bradycardia
This interval represents the time from the start of atrial depolarization to the start of the ventricle depolarization
PR interval
Three or more consecutive PVCs on an EKG are called this.
Ventricular Tachycardia
A wide QRS complex typically means this part of the heart's conduction system is affected.
The Ventricles
This lead is located in the 5th intercostal space at the midclavicular line.
V4
A prolonged QT interval can increase the risk of this dangerous arrhythmia.
Torsades de Pointes
This segment is measured to detect myocardial ischemia or infarction.
ST segment
This rhythm can be fatal within minutes and shows chaotic, erratic activity without identifiable waves.
Ventricular Fibrillation
This electrolyte imbalance can cause peaked T waves on an EKG.
Hyperkalemia
These leads are considered the “augmented” leads in a 12-lead EKG.
aVR, aVL, and aVF
This condition may show diffuse ST elevation and PR depression across multiple leads.
Pericarditis
A normal resting heart rate should result in this range of beats per minute on an EKG.
60-100 bpm
In this AV block, the PR interval progressively lengthens until a beat is dropped.
Mobitz type I (Wenckebach)
This interval, when prolonged, increases the risk for Torsades de Pointes.
QT interval
This is the correct anatomical location for lead V6
the 5th intercostal space at the midaxillary line
This inherited condition may show a delta wave and a shortened PR interval on the EKG.
Wolff-Parkinson-White (WPW) syndrome