Substrate is very often a big debate in keeping tortoises. I have Russian tortoises, I try to mimic their natural habitat as closely as possible.Since they are an arid species, I use a 50/50 mixture of playsand and topsoil deep enough for the tortoise to burrow.ubstrate is very often a big debate in keeping tortoises. I have Russian tortoises, I try to mimic their natural habitat as closely as possible.
Headaches That May Present With Ophthalmic Manifestations Primary Headache Syndromes Migraine Migraine is the second most common headache syndrome seen in clinical practice. Migraine headache is often characterized as a disabling pain, moderate to severe in intensity, unilateral in location, and pulsatile in quality.
pulmonary vascular resistance the vascular resistance of the pulmonary circulation; the difference between the mean pulmonary arterial pressure and the left atrial filling pressure divided by the cardiac output. Called also total pulmonary vascular resistance. total peripheral resistance the vascular resistance of the systemic circulation: the difference between the mean arterial pressure and central venous pressure divided by the cardiac output. total pulmonary resistance (total pulmonary vascular resistance) pulmonary vascular resistance.