Bundle branch blocks - Study guides, Class notes & Summaries

Automaticity correct answer: Ability to initiate an impulse at a regular interval; "pacemaker" Excitability correct answer: Ability of the heart to respond to a stimulus Conductivity correct answer: Ability of the heart to transmit an electrical impulse from one cell membrane to another Contractility correct answer: The ability of the heart muscle cells to shorten in response to an electrical stimulus Refractoriness correct answer: "Resistant to"; cannot respond to a stimulu...

Med Surg II Exam 1 Questions and Answers Latest Updated Version. FOCUS POINTS EXAM 1 CARDIAC (MED SURG II EXAM 1) Dysrhythmias Abnormal heart rate or rhythm Caused by a disturbance in electrical conduction of the heart, not by abnormal heart structure May be benign or have lethal consequences Cardiac output = stroke volume x HR Patho ● 5 unique properties of cardiac cells ○ Automaticity → spontaneously initiate an electrical impulse ■ Changes in automaticity cause tachydysrhyth...

Nitroprusside purpose - Answer- decreases preload and afterload by vasodilation (mainly afterload) Dobutamine mechanism of action - Answer- contractility Dopamine at a low-end dose "renal dose" - Answer- 0.5-4mcg/kg/min increases renal and mesentric perfusion Dopamine at a mid-range dose - Answer- 4-10mcg/kg/min increases contractility and heart rate Dopamine at a high-range dose - Answer- greater than 10mcg/kg/min vasoconstriction and increases BP Dopamine and Levophed inf...

Normal PR segment length 0.12 - 0.2 sec 3 - 5 small boxes Normal QRS interval 0.06 - 0.1 sec 1 - 3 small boxes Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:01 / 0:15 Full screen Normal P amplitude & duration < 0.12 sec (3 small boxes) < 0.25 mV (2.5 small boxes) causes of arrhythmias HISDEBS: hypoxia, ischemia/irritability, SNS, drugs, electrolytes, bradycardia, stretch (hypertrophy/enlargement) symptoms...

PCCN Cardiac Exam 127 Questions with Verified Answers Which of the following is the outermost lining of the heart? A. Endocardium B. Myocardium C. Transcardium D. Pericardium - CORRECT ANSWER D. Pericardium "Endo" meaning "within" is associated with the innermost lining of the heart, so eliminate A. The myocardium is associated with the heart's middle layer, so eliminate option B. The "transcardium" is somewhat of a contrived term, so eliminate C as well. The prefix in pericardium...

Kaiser EKG Post Test Heart Blocks with Questions and Answers Which is the correct intervention sequence for asystole? Assess the patient; initiate CPR; defibrillate ASAP Assess the patient; confirm rhythm in another lead; initiate CPR Assess the patient; confirm rhythm in another lead; synchronize cardiovert Confirm rhythm in another lead; assess the patient; initiate CPR ANSWER Assess the patient; confirm rhythm in another lead; initiate CPR What does the information found in the last...

Med Surg II Exam 1 Questions and Answers Latest Updated Version. FOCUS POINTS EXAM 1 CARDIAC (MED SURG II EXAM 1) Dysrhythmias Abnormal heart rate or rhythm Caused by a disturbance in electrical conduction of the heart, not by abnormal heart structure May be benign or have lethal consequences Cardiac output = stroke volume x HR Patho ● 5 unique properties of cardiac cells ○ Automaticity → spontaneously initiate an electrical impulse ■ Changes in automaticity cause tachydysrhyth...

Dilated Cardiomyopathy: most common cause is ____. Others? - Answer- alcohol; may also be idiopathic, myocarditis, or drugs (doxorubicin) -- 1 in 3 cases of heart failure are caused by dilated cardiomyopathy What PE and EKG changes are seen with dilated cardiomyopathy? - Answer- PE: S3, JVD, crackles - possible mitral regurg EKG: nonspecific ST and T wave changes, LBBB Hypertrophic cardiomyopathy: is due to hypertrophy of the _____. PE reveals mitral regurgitation, a ____heart sound, and ...

Straighterline A&P II Quiz 2 with complete solutions What event(s) occur during the QRS complex of an ECG? a. depolarization of the atria b. repolarization of the ventricles c. depolarization of the atria and repolarization of the ventricles d. depolarization of the ventricles and repolarization of the atria -Correct Answer-d. depolarization of the ventricles and repolarization of the atria Blood in the pulmonary veins returns to the a. right atrium. b. left atrium. c. right ventricle....

Electrocardiogram (ECG) correct answer: Since you can't see the heart beating we use a ECG to provide a picture that replicates the actual cardiac issue. Myocardial Infraction (MI) correct answer: Heart Attack -Have abnormal rhythms. -Death of cardiac muscle due to ischemia Doe the ECG machine monitor or control the hearts rhythm? correct answer: Only monitors Straight line when machine is turned on but not connected to the patient correct answer: Isoelectric = no current ...