Cardiorenal Syndrome

Summary:
Why on earth are renal physicians so keen on cardiovascular examination? Well, the anatomically distinct heart and kidneys are entwined in a dance of homoeostatic elegance... a dance to the death, where if one goes, it takes the other with it. Hence chronic kidney disease leading to heart failure, or arrhythmias causing kidney injury.
This paper has gorgeous diagrams of the pathophysiology.

Link:
Cardiorenal Syndrome - J Am Coll Cardiol. 2008;52(19):1527-1539

Key Points explored:
What are the factors which cause renal disease to injure the heart?
Similarly what heart factors injure the kidney?
How do the physiological homoeostatic mechanisms go awry?
What can you do to keep these people on track?