Sand should be part of the topdressing used to topdress your field after aerating and before overseeding. However, this section on sand is for a different use of sand. Sanding the baseball field turf, especially the infield, is a good practice.and should be part of the topdressing used to topdress your field after aerating and before overseeding. However, this section on sand is for a different use of sand. Sanding the baseball field turf, especially the infield, is a good practice.
Atrioventricular (AV) Block. A slow heart rate can be due to many causes, including the earlier described sick sinus syndrome (SSS). Another cause, atrioventricular block (AV block), is due to abnormally slowed electrical conduction of the sinus impulse through the AV node.
What Causes Avascular Necrosis? There are two major forms of AVN, traumatic or non-traumatic (meaning no injury). Hip fractures or hip joint dislocations, partial or complete, are the most common causes of AVN. Direct damage to the hip blood vessels can occur with these injuries, resulting in loss or compromise of blood flow to the femoral head. The mysterious loss of blood flow to the hip in the non-traumatic form has been associated with many risk factors, but the exact cause is not always well understood. In fact, about 25% of patients with AVN of the hip develop the disorder for no apparent reason.