What is an ECG? Asystole Pulseless Electrical Activity 3° AV Block 2° AV Block Type II 2° AV Block Type I 1° AV Block Torsades de Pointes Ventricular Fibrillation Ventricular Tachycardia Premature Ventricular Contractions Wolff Parkinson White Multifocal Atrial Tachycardia Premature Atrial Contractions AV Nodal Reentry Tachycardia Atrial Flutter Atrial Fibrillation Normal Sinus Rhythms Sinus Arrhythmia
2° AV Block Type I
These blocks typically arise from the HIS- Purkinje system and therefore pose more of a problem for the patient.
The typical pattern for this type of block, as seen on EKG, is a PR prolongation leading to a dropped beat.
“A type I block manifesting with atypical electrocardiographic findings that result in a misdiagnosis of type II block is not uncommon. During very long sequences (typically >6:5), PR interval prolongation may be minimal until the last beat of the cycle, when it prolongs abruptly, or the AV interval may shorten and then lengthen in the middle of the sequence. Postblock PR interval shortening remains the cornerstone of the diagnosis of type I block, regardless of whether the periodicity has typical or atypical features.” (17)
Do you know that 90% of the stroke could have been prevented?
Smaller than a credit card, Kardia Mobile allows you to capture single-lead EKGs anywhere, anytime. In 30 seconds, it records a medical-grade EKG, which can be relayed to a doctor for analysis and diagnosis. Kardia Mobile easily attaches to most smartphones making it convenient to always have with you. Learn more about it.