Tachyarrhythmias

Question 1

Normal sinus mechanism precipatated by exertion, stress, concurrent illness

Answer 1

Physiologic sinus tachycardia

Question 2

May continue despite beats that fail to conduct to ventricles, indication that AV node is not participating in tachycardia circuit

Answer 2

Tachycardias originatinf from atrium

Question 3

tachycardia from the normal sinus node area that occurs without an identifiable precipitating factor as a result of dysfunctional autonomic regulation

Answer 3

Inappropriate sinus tachycardia

Question 4

Regular atrial tachycardia with defined p wave; may be sustained, nonsustained, paroxysmal, or incessant. Frequent sites of origin occur along the valve annuli of left or right atrium, pulmonary veins, coronary sinus musculature, superior vena cava

Answer 4

Focal atrial tachycardia

Question 5

organized reentry creates organized atrial activity, commonly seen as sawtooth flutter waves at rates typically faster than 200 beats/min

Answer 5

Atrial flutter

Question 6

Right atrial reentry parallel to the tricuspid annulus and dependent on conduction through the isthmus between the inferior vena cava and tricuspid annulus

Answer 6

Common atrial flutter

Question 7

Usually due to reentry in left or right atrium associated with scars usually from prior surgery or catheter ablation for atrial fibrillation, but may be idiopathic

Answer 7

Atypical atrial flutter

Question 8

chaotic rapid atrial electrical activity with variable ventricular rate; the most common sustained cardiac arrhythmia in older adults

Answer 8

Atrial fibrillation

Question 9

multiple discrete p waves often seen in patients with pulmonary disease during acute exacerbations of pulmonary insufficiency

Answer 9

Multifocal atrial tachycardia

Question 10

paroxsymal regular tachycardia with P waves visible at the end of the QRS complex or not visible at all; the most common paroxysmal sustained tachycardia in healthy young adults; more common in women

Answer 10

AVNRT

AV nodal reentry tachycardia

Question 11

paroxysmal sustained tachycardia similar to AV nodal reentry; during sinus rhythm, evidence of ventricular preexcitation may be present (Wolff-Parkinson-White syndrome) or absent (concealed accessory pathway)

Answer 11

Orthodromic AV reentry tachycardia

Question 12

wide QRS tachycardia with QRS morphology similar to VT

Answer 12

Preexcited tachycardia

Question 13

Regular paroxysmal tachycardia

Answer 13

Antidromic AV reentry

Question 14

Irregular wide complex, or intermittently wide complex tachycardia, some with dangerously rapid rates faster than 250/min

Answer 14

Atrial fibrillation with preexcitation