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Study with Quizlet and memorize flashcards containing terms like Method, What does the P-R interval represent?, How and why do the PR and RR interval change during exercise? and more.
Study with Quizlet and memorize flashcards containing terms like PR segment, PR segment depression: Causes, Pericarditis and more.
Study with Quizlet and memorize flashcards containing terms like What is the 4th step in EKG analysis?, What is the 5th step in EKG analysis?, What does the PR interval represent? and more.
Definition. The PR interval is the time it takes for the electrical impulse to travel from the atria (upper chambers of the heart) to the ventricles (lower chambers of the heart) in the cardiac conduction system.
13 lut 2023 · The speed of a chemical reaction may be defined as the change in concentration of a substance divided by the time interval during which this change is observed: \[ \text{rate}=\dfrac{\Delta \text{concentration}}{\Delta \text{time}} \label{2-1} \]
If molecules were little spheres (a classical picture) we would expect that $\sigma_c = \pi(r_1 + r_2)^2$, where $r_1$ and $r_2$ are the radii of the two colliding objects. The chance that our particle will have a collision is the ratio of the area covered by scattering molecules to the total area, which we have taken to be one.
In electrocardiography, the PR interval is the period, measured in milliseconds, that extends from the beginning of the P wave (the onset of atrial depolarization) until the beginning of the QRS complex (the onset of ventricular depolarization); it is normally between 120 and 200 ms in duration.
