Adult Health 2 ch 35: Dysrhythmias Exam Questions With Verified Answers
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Course
Dysrhythmias
Institution
Dysrhythmias
Adult Health 2 ch 35: Dysrhythmias Exam
Questions With Verified Answers
What are dysrhythmias? - answerabnormal heart rhythms
The four properties of heart cells allow what? - answerthe conduction system to start an
electrical impulse
send it through the heart tissue
stimulate muscle contracti...
EXAM STUDY MATERIALS July 23, 2024 4:26 PM Adult Health 2 ch 35: Dysrhythmias Exam Questions With Verified Answers What are dysrhythmias? - answer✔✔abnormal heart rhythms The four properties of heart cells allow what? - answer✔✔the conduction system to start an electric al impulse send it through the heart tissue stimulate muscle contraction What is an Electrocardiogram (ECG)? - answer✔✔a graphic tracing of the electrical impulses produced in the heart What do the waveforms on the ECG represent? - answer✔✔electrical activ ity produced by the movement of ions across the membranes of heart cells, representing depolarization and repolarization True or false: the membrane of a heart cell is semipermeable? - answer✔✔true Who can be affected by dysrhythmias? - answer✔✔All ages! What are the four properties of heart cells? - answer✔✔Automaticity Excitability Conductivity Contractility What is the automaticity of a heart cell? - answer✔✔ability to initiate an impulse spontaneously and continuously; ability to automatically work and stimulate contractions What is the Excitability of a heart cell? - answer✔✔ability to be electrically stimulated; (mainly by calcium and potassium) What is the conductivity of a heart cell? - answer✔✔ability to transmit an impulse along a membrane in an or derly manner What is the Contractility of a heart cell? - answer✔✔ability to respond mechanically to an impulse; (the actual contracting) EXAM STUDY MATERIALS July 23, 2024 4:26 PM If there is a problem with one or more properties in the heart is it called? - answer✔✔dysrhythmia What can prolonged tachycardia cause? - answer✔✔heart to wear out What is the electrical pathway through the heart? - answer✔✔SA node AV node Bundle of his Down the left and right bundle branches Purkinje fibers What does the SA node do for electrical cont raction? - answer✔✔causes the atrium to contract What is considered the pace maker of the heart? - answer✔✔SA node What does the AV node do for electrical contraction? - answer✔✔starts ventricles to contract; sending messages from atrium to ventricles What does the Parasympathetic Nervous system do? - answer✔✔decreases rate of SA node (heart rate) slows impulse conduction of AV node What is the main component of the autonomic nervous system that affect the heart? - answer✔✔the vagus nerve fibers of the para sympathetic nervous system and nerve fibers of the sympathetic nervous system What does the sympathetic nervous system do? - answer✔✔increases rate of SA node (heart rate) increases impulse conduction of AV node Increases cardiac contractility What does th e stimulation of the vagus nerve cause? - answer✔✔a decreased rate of firing of the SA node and slowed impulse conduction of the AV node What is the normal heart rate range? - answer✔✔60-100 bpm What are some risk factors for dysrhythmias? - answer✔✔weight activity drug use like tobacco, nicotine cocaine
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