UTA ECG Exam 2 Questions With Complete
Solutions
Sinus Tachycardia - correct answer (HR greater than or equal to 100 bpm with
regular r2r and p2p - One P wave before QRS complex 1:1 ratio)
Sinus Tachycardia - correct answer Sympathetic tone increased, bronchodilators,
caffeine, cocaine, amphetamines, acute MI, PE, or CHF
Treated according to underlying cause
Sinus block/pause or arrest - correct answer (R2R interval is longer than multiple
R2R intervals)
Sinus block/pause or arrest - correct answer Ischemic disease of SA node,
extreme vagal tone, digitalis, or degenerative changes
Treat according to underlying cause’ May be a precursor to SSS, would need
pacemaker
Sinus Bradycardia - correct answer (One P wave before each QRS complex (1:1
ratio)
, HR less than 60 bam with regular R2R and P2P interval that are consistent
Right Atrial Enlargement - correct answer (Tall symmetrically peaked P waves in
Lead II with amplitudes larger than 2’5 mm - 2 or more small boxes)
Right Atrial Enlargement - correct answer COPD (pressure overload of RA),
tricuspid valve disease, PE, cystic fibrosis, scarring of lung tissue,
kyphoscoliosis, obstructive sleep apnea
Pulmonary vasoconstriction, cellular proliferation, prevention of thrombosis’
Beta-receptor antagonists, inotropes, diuretics, and possibly pacemaker
Left Atrial Enlargement - correct answer (Wide notched prolonged P wave with
duration greater than or equal to ‘12 sec - 3 small boxes, Biphasic P wave in V1
with negative terminal component greater than the initial positive component)
The negative portion of the p wave in V1 is greater than 1mm wide and 1 mm deep
If the P wave in V1 is completely negative this usually reflects left atrial
abnormalities’
Solutions
Sinus Tachycardia - correct answer (HR greater than or equal to 100 bpm with
regular r2r and p2p - One P wave before QRS complex 1:1 ratio)
Sinus Tachycardia - correct answer Sympathetic tone increased, bronchodilators,
caffeine, cocaine, amphetamines, acute MI, PE, or CHF
Treated according to underlying cause
Sinus block/pause or arrest - correct answer (R2R interval is longer than multiple
R2R intervals)
Sinus block/pause or arrest - correct answer Ischemic disease of SA node,
extreme vagal tone, digitalis, or degenerative changes
Treat according to underlying cause’ May be a precursor to SSS, would need
pacemaker
Sinus Bradycardia - correct answer (One P wave before each QRS complex (1:1
ratio)
, HR less than 60 bam with regular R2R and P2P interval that are consistent
Right Atrial Enlargement - correct answer (Tall symmetrically peaked P waves in
Lead II with amplitudes larger than 2’5 mm - 2 or more small boxes)
Right Atrial Enlargement - correct answer COPD (pressure overload of RA),
tricuspid valve disease, PE, cystic fibrosis, scarring of lung tissue,
kyphoscoliosis, obstructive sleep apnea
Pulmonary vasoconstriction, cellular proliferation, prevention of thrombosis’
Beta-receptor antagonists, inotropes, diuretics, and possibly pacemaker
Left Atrial Enlargement - correct answer (Wide notched prolonged P wave with
duration greater than or equal to ‘12 sec - 3 small boxes, Biphasic P wave in V1
with negative terminal component greater than the initial positive component)
The negative portion of the p wave in V1 is greater than 1mm wide and 1 mm deep
If the P wave in V1 is completely negative this usually reflects left atrial
abnormalities’
