Which of the following is NOT a condition that can cause atrioventricular heart block?

Atrioventricular (AV) heart block occurs when electrical signals cannot travel properly through the heart's conduction system, particularly between the atria and ventricles. Various medical conditions can lead to this disruption.

Myocardial infarction can lead to heart block due to damage to the heart tissue and its conduction pathways. Rheumatic fever is known to cause inflammation in the heart, potentially affecting the electrical conduction system. Idiopathic fibrosis refers to the occurrence of fibrous tissue replacing normal tissue, which can disrupt normal conduction pathways as well.

In contrast, while hypertension is a serious cardiovascular condition that can have many effects on the heart, it does not directly cause AV heart block. Hypertension can lead to structural changes in the heart over time, but it is not typically linked to the electrical conduction problems that result in the block. Therefore, it is understood that hypertension is less likely to be the direct cause of atrioventricular heart block compared to the other options listed.