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Type 1 second-degree heart block is considered more benign than type 2 second-degree heart block. [4] The type 1 does not have structural changes found on histology. Both types are named after Woldemar Mobitz. [5] [6] Type I is also named after Karel Frederik Wenckebach, [7] and type II is also named after John Hay. [8] [9]
The heart rate produced by the ventricles is much slower than that produced by the SA node. [1] Some AV blocks are benign, or normal, in certain people, such as in athletes or children. Other blocks are pathologic, or abnormal, and have several causes, including ischemia, infarction, fibrosis, and drugs.
Infra-Hisian block is that of the distal conduction system. Types of infra-Hisian block include: Type 2 second degree heart block (Mobitz II) – a type of AV block due to a block within or below the bundle of His [5] Left anterior fascicular block; Left posterior fascicular block; Right bundle branch block; Left bundle branch block
Karel Frederik Wenckebach (Dutch: [ˈkaːrəl ˈfreːdərɪk ˌʋɛŋkəˈbɑx]; March 24, 1864 – November 11, 1940) was a Dutch anatomist who was a native of the Hague. He studied medicine in Utrecht , and in 1901 become a professor of medicine at the University of Groningen .
In North America and Australia, DSM-5 criteria are used for diagnosis, while European countries usually use the ICD-10. The DSM-IV criteria for diagnosis of ADHD is 3–4 times more likely to diagnose ADHD than is the ICD-10 criteria. [212] ADHD is alternately classified as neurodevelopmental disorder [213] or a disruptive behaviour disorder ...
Heart block describes a type of arrhythmia, or abnormal rhythm, that happens when the electrical signal gets held up and delayed, or blocked entirely at some point along the conduction system. These blocks or delays usually happen because of some sort of damage or fibrosis to the electrical conduction system, the pathways that conduct the ...
ADHD can only be diagnosed by a licensed clinician, and the first step to do so is via screening with validated tools to screen for ADHD in adults. [10] [12] [13] The Adult ADHD Self Report Rating Scale (ASRS) is a validated screening tool recognized by the World Health Organization (WHO) with a sensitivity and specificity of 91.4% and 96.0% ...
The DSM-5 allows for diagnosis of the predominantly inattentive presentations of ADHD (ICD-10 code F90.0) if the individual presents six or more (five for adults) of the following symptoms of inattention for at least six months to a point that is disruptive and inappropriate for developmental level: