If you see PAT with AV block on an EKG, what condition might you suspect?

If you see PAT with AV block on an EKG, what condition might you suspect?

• A. Electrolyte imbalance
• B. Digitalis overload/toxicity
• C. Pulmonary embolism
• D. Coronary artery disease

Answer: (B)

In the context of seeing paroxysmal atrial tachycardia (PAT) associated with an atrioventricular (AV) block on an electrocardiogram (EKG), digitalis overload or toxicity is a highly relevant condition to consider. Digitalis, a medication often used for heart conditions, can increase vagal tone and lead to alterations in the conduction pathways of the heart. This can manifest as both tachycardia, such as PAT, and varying degrees of AV block, particularly if the levels of digitalis in the body become excessive.

When evaluating EKG readings that show PAT in conjunction with an AV block, it’s essential to recognize that this combination indicates a potential compromise in the heart's conduction system, which is often a direct result of digitalis toxicity. Patients with such a presentation may exhibit symptoms of toxicity, including gastrointestinal disturbances, visual changes, and altered mental status, in addition to the EKG findings.

Other conditions like electrolyte imbalances can cause various arrhythmias, but they do not specifically correlate with PAT and AV block as specifically as digitalis overload. Additionally, while pulmonary embolism and coronary artery disease can present with tachycardias or other arrhythmias, they typically do not lead to