15 Questions
What does negative deflection indicate in an ECG?
The electrical impulse is moving from positive toward negative.
List some substances that can impact cardiac function.
Illicit drugs, ADHD medications, alcohol, tobacco, and caffeine.
Name some conditions that can lead to altered conduction pathways in the heart.
Cardiomyopathy, Mitral Valve Prolapse, MI, any structural heart disease.
What is the general approach to treating asymptomatic PVCs?
Patients rarely require treatment.
What is the recommended treatment for hypoxic patients experiencing PVCs?
Oxygen.
How should electrolyte imbalances in patients with PVCs be managed?
Corrected.
What should be ruled out in patients presenting with frequent PVCs?
Drug toxicity and acute MI.
If medications are unsuccessful in treating PVCs, what could be considered?
Radiofrequency catheter ablation.
What are the two major characteristics used to name PVCs?
Site of Origin and Visual Indicators
What is the difference between unifocal and multifocal PVCs?
Unifocal PVCs originate from the same site and look identical, while multifocal PVCs originate from different sites and look different from each other.
What is the frequency of occurrence for a PVC that happens every 2 beats?
Bigeminy
Define NSVT in terms of PVCs.
Non-sustained Ventricular Tachycardia: 3 or more consecutive PVCs for less than 30 seconds.
What does V-Tach stand for and how is it defined in terms of PVCs?
Ventricular Tachycardia: 3 or more consecutive PVCs for more than 30 seconds.
What is the visual indicator that can be observed in PVCs related to electrolyte abnormalities?
Broad QRS complex ≥120 milliseconds with abnormal morphology
Name one possible cause of PVCs related to hyperactivity of the SNS.
Increase in SNS “fight or flight” with Epinephrine or norepinephrine activity on Beta Adrenergic receptors.
Test your knowledge on the characteristics and visual indicators of Premature Ventricular Contractions (PVCs). Understand the differences between unifocal and multifocal PVCs, as well as the visual cues associated with PVCs like broad QRS complexes and electrolyte abnormalities.
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