RELIAS DYSRHYTHMIA BASIC TEST ANSWERS 2024 (A+ GRADED 100% VERIFIED
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Course
RELIAS DYSRHYTHMIA BASIC
Institution
RELIAS DYSRHYTHMIA BASIC
dysrhythmia aka arrhythmia - Correct answer - abnormal cardiac rhythms
which can cause disturbances of:
rate, rhythm, or both rate and rhythm
how are dysrhythmias identified? - Correct answer Electrographic Waveform Analysis
(ECG)
what controls the rate and rhythm of the heartbeat? - Corr...
RELIAS DYSRHYTHMIA BASIC TEST ANSWERS 2024 (A+ GRADED 100% VERIFIED BY EXPERT) 1 [Date] dysrhythmia aka arrhythmia - Correct answer - abnormal cardiac rhythms which can cause disturbances of: rate, rhythm, or both rate and rhythm how are dysrhythmias identified? - Correct answer Electrographic Waveform Analysis (ECG) what controls the rate and rhythm of the heartbeat? - Correct answer the heart's electrical system explain the heart's electrical system - Correct answer Each electrical signal (impulse) begins in a group of cells called the sinus node or sinoatrial (SA) node. The SA node is located in the right atrium. In a healthy adult heart at rest, the SA node sends an electrical signal to begin a new heartbeat 60 to 100 times a minute. (This rate may be slower in very fit athletes.) From the SA node, the electrical signal travels through the right and left atria. It causes the atria to contract and pump blood into the ventricles. The electrical signal then moves down to a group of cells called the atrioventricular (AV) node, located between the atria and the ventricles. Here, the signal slows down slightly, allowing the ventricles time to finish filling with blood. The electrical signal then leaves the AV node and travels to the ventricles. It causes the ventricles to contract and pump blood to the lungs and the rest of the body. The ventricles then relax, and the heartbeat process starts all over again in the SA node. normal sinus rhythm (characteristics) - Correct answer 1. Rate:60-100 beats/min Rhythm: regular 2. P wave: upright .06-.12 sec 3. PR interval: .12-.20 sec 4. QRS complex: <.03 sec Sinus Bradycardia - Correct answer in sinus bradycardia, the conduction pathway is the same but the impulse generates in the SA node slower than usual causing a slowed heart rate >60 -symptomatic sinus bradycardia refers to a HR >60 and is inadequate for the patients condition causing symptoms sinus bradycardia (ECG characteristics) - Correct answer 1. Rate: < 60 beats/min RELIAS DYSRHYTHMIA BASIC TEST ANSWERS 2024 (A+ GRADED 100% VERIFIED BY EXPERT) 2 [Date] Rhythm: regular 2. P wave: Normal 3. PR interval: Normal 4. QRS complex: Normal sinus bradycardia clinical associations - Correct answer 1. may be a normal in ATHLETES and during SLEEP 2. occurs in response to: carotid sinus massage Valsalva maneuver hypothermia increased intraocular pressure vagal stimulation and certain drugs ( Bblockers, Ca channel blockers) 3. disease states associated with it: hypothyroidism increased intracranial pressure hypoglycemia inferior MI Sinus Bradycardia: Clinical Significance - Correct answer clinical significance of sinus bradycardia depends on how the pt tolerates it. S&S of symptomatic sinus bradycardia include: pale, cool skin hypotension weakness angina dizziness/syncope confusion/disorientation shortness of breath treatment for symptomatic sinus bradycardia - Correct answer atropine (anticholinergic) transcutaneous pacing dopamine/epinephrine infusion permanent pacemaker RELIAS DYSRHYTHMIA BASIC TEST ANSWERS 2024 (A+ GRADED 100% VERIFIED BY EXPERT) 3 [Date] if due to drugs, drugs may be held transcutaneous pacing - Correct answer aka external pacing. Temporary means of pacing a patient's heart during a medical emergency, accomplished by delivering pulses of electric current through the patient's chest, which stimulates the heart to contract. The most common indication for transcutaneous pacing is an abnormally slow heart rate. -pads are placed on the patient's chest. anterior/posterior position is preferred. "Sandwiching" the heart between the two pads minimizes transthoracic electrical impedance Sinus Tachycardia - Correct answer rate is faster than usual but rhythm is normal. impulse is generated quicker than normal in SA node sinus tachycardia (characteristics) - Correct answer 1. Rate:101-200 beats/min Rhythm: regular 2. P wave: Normal 3. PR interval: Normal 4. QRS complex: Normal Sinus Tachycardia: Clinical Associations - Correct answer associated with physiologic and psychologic stressors or drugs Sinus Tachycardia: Clinical Significance - Correct answer depends on pts tolerance of the increased HR - may have dizziness, dyspnea, and hypotension because of decreased CO Sinus Tachycardia: Treatment - Correct answer underlying cause of tachycardia guides the treatment -ex: if pt is experiencing tachycardia from pain, effective pain management is important to treat tachycardia - in clinically stable pts, vagal maneuvers can be attempted. In addition, IV Bblockers can be given to decrease HR and decrease myocardial oxygen consumption Premature Atrial Contraction (PAC) - Correct answer a PAC is a contraction starting at an ectopic focus in the atrium and coming sooner than the next expected sinus beat -P wave is abnormally shaped bc the impulse travels across the atria in an abnormal pathway
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