Excessive sodium: High urinary levels of sodium result in increased levels of calcium. Certain defects in the kidney tubules transport system, which cause imbalances in sodium and phosphate, can lead to high calcium levels in the urine. A diet high in salt can also produce this effect.
Some of the common causes of Decreased cardiac output may include: 1  Mitral regurgitation. 2  Azotemia. 3  Hypotension. Cardiac tamponade.  Restrictive 1  cardiomyopathy. more causes...Â».
Because the mechanisms of cardiac-output-reserve (an increase in heart rate, blood volume, and cardiac contractility) are already a maximal use, there is a direct correlation with reduced exercise capacity.yperdynamic circulation. The cardiac effects of hyperthyroidism commonly cause increased preload with low systemic vascular resistance, a high heart rate, and increased cardiac muscle oxygen consumption. In the short term hyperthyroidism these effects result in an increased heart rate and high cardiac output.