Intrinsicoid deflection
Intrinsicoid Deflection
Intrinsicoid deflection (pronounced: in-trin-si-koid de-flec-tion) is a term used in Electrocardiography to describe a specific part of the QRS complex on an Electrocardiogram (ECG).
Etymology
The term "Intrinsicoid" is derived from the Latin word "intrinsicus" meaning "inward" and the Greek word "eidos" meaning "form" or "shape". The term "deflection" is derived from the Latin word "deflectere" which means "to bend down" or "to turn aside".
Definition
Intrinsicoid deflection refers to the time taken for the initial downward deflection in the ventricular depolarization waveform to reach its peak in the precordial leads V1-V3 on an ECG. It is usually less than 0.035 seconds (35 milliseconds) in lead V1 and less than 0.045 seconds (45 milliseconds) in lead V6.
Clinical Significance
An increased intrinsicoid deflection time can be indicative of a ventricular hypertrophy or a conduction system disease. It is an important parameter to consider in the diagnosis of various cardiac diseases.
Related Terms
- Electrocardiography
- QRS complex
- Electrocardiogram
- Ventricular depolarization
- Ventricular hypertrophy
- Conduction system of the heart
- Cardiac disease
External links
- Medical encyclopedia article on Intrinsicoid deflection
- Wikipedia's article - Intrinsicoid deflection
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