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Medsurg 2 exam

HEAL100 Health Care — exam and revision material · Other

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Health Care exam material, 78 pages. Originally published on StudyMerit.

Pages
78
Academic year
2025/2026
Language
English

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Medsurg 2 Exam #1 Study online at https://quizlet.com/_cynwy8 1 . Introduction to Electrocardiogra- phy 2 . 4 Specialized Myco- cardial Cells 1. Automaticity 2. Excitability 3. Conductivity 4. Contractility 3 . 3 Part of the Cardiac Conduction System 1. Sinoatrial Node 2. Atrioventricular Junction 3. Bundle of His *in order of beginning to end* 4 . Sinoatrial Node 1. ' Pacemaker' of the heart - first to generate an action potential or electrical im- pulse 2. Electrical impulses between 60-100 beats/min 3. P wave on ECG 4. Causes the atrias to contract to expel blood into the ventricles 5 . What would hap- pen if the Sinoa- trial Node Stopped Working? 1. Other parts of the heart could take over and 'fire' impulses ex: SA node stops working so the AV junction begins to send the electrical impulses and acts as the pace- maker. CANNOT live like this for a long time, person will require a pacemaker to survive 6 . Atrioventricular Junction 1. PR segment on ECG 2. Contraction known as 'atrial kick' 3. Electrical impulse will slow down for a bit allowing 1 / 78

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Medsurg 2 Exam #1 Study online at https://quizlet.com/_cynwy8 the ventricles to fill with blood 4. Electrical impulse will then go down the bundle of HIS branches on both sides of the ventricles 7 . Bundle of His 1. A big bundle travels down the septum and splits off into two - once the bundle of HIS splits, it is known as bundle branches - one going to the right ventricle (right bundle branch- es) - the other going to the left ventricle (left bundle branch- es) 2. Electrical impulse will cause the ventricles to con- tract and eject blood out to the lungs (right) and body (left) 3. QRS segment on ECG 8 . 12 Lead EKG: What is it 1. 10 wires 2. The 'golden standard' for diagnosing *electrical is- sues* 9 . Where does a 12 Lead EKG Start on the Body? 1. Starts at the 4th intercostal space - V1 is on the right sternal border, 4th IC space - V2 is on the left sternal border, 4th IC space - V4 is mid axillary line below the left nipple, 5th IC space - V5, V6 follow V4 to the left 10 . 2 / 78

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Medsurg 2 Exam #1 Study online at https://quizlet.com/_cynwy8 If a patient was hav- ing a heart attack, which type of EKG would you use? 1. 12 lead EKG - has enough placements to show the entire picture of the heart - can tell you what is happening the fastest and most accurately 2. NOT a 3 lead or 5 lead - will not pick up all the hearts impulses 11 . Placement for a 12 Lead EKG * V1* - 4th intercostal space, right sternal border *V2* - 4th intercostal space, left sternal border *V3* - between V2 and V4 *V4* - 5th intercostal space, midclavicular line *V6* - horizontally even with V4 and V5, mid axillary line *RA* - right arm - AVOID thick muscle *LA* - left arm - AVOID thick muscle *RL* - right leg - inner aspect of calf muscle - AVOID bone *LL* - left leg 3 / 78

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