This comprehensive manual reviews the management of cardiorenal syndrome in heart failure. Chapters are structured in a practically applicable and easy-to-follow format with realistic case vignettes and key clinical management questions and answers, followed by a brief discussion of underlying pathophysiological mechanisms of a patient with cardiorenal syndrome. Building from this case, key questions are posed that are relevant to the clinical management and then potential evidence-based treatment strategies are proposed. Topics covered include loop diuretic resistance in acute and chronic heart failure, abdominal congestion, low output failure and potential diuretic complications due to hyponatremia.