CCT Exam Flashcards/Questions and Answers
Multifocal Atrial Tachycardia - -Type of SVT
Narrow QRS
3 Different P wave morphologies
HR over 100 bpm
Common in older patients with underlying conditions
Treatment focuses on correcting underlying cause and and ensuring normal
electrolyte balance. Medications used control rate such as beta blockers and
calcium channel blockers
-Junctional Rhythm - -the SA node is nonfunctional, P waves are absent, and
heart is paced by the AV node at 40-60 beats/min
Narrow QRS complex
Symptoms may include lightheadedness, SOB or syncope
Treatment includes electrolyte replacement and possibly discontinuing
medications that slow rate
-Pathophysiology of Complete Heart Block - -Third Degree AV Block, failure
of HIS Purjunke system to conduct the electrical depolarization to the
ventricles
AV node does not conduct depolarization of ventricles
Atria and Ventricles beat independently of each other
Atrial Rate faster than
Profoundly bradycardic
Commonly caused by CAD, usually require a pacemaker
-PR segment - -Represents the conduction of the cardiac impulse from the
atria to the ventricles. Starts at the end of the P wave and ends with the start
of the QRS complex
-ST segment - -Represents the beginning of ventricular repolarization.
Starts at the end of the QRS wave and ends at the start of the T wave.
The basis for diagnosis of myocardial ischemia
-TP segment - -Starts at the end of the T wave to the start of the next p
wave.
represents the time during which the heart is electrically silent or relaxed
-Effect of Nitrates on BP and HR - -Cardiac medications that decrease the
hearts oxygen demand by relaxing muscles in blood vessels and coronary
arteries allowing them to widen
Decrease Blood Pressure
Slow Heart Rate
nitrate drugs include isosorbide mononitrate, nitroglycerin
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