Exercise testing has an established role in the evaluation of patients with valvular heart disease and can aid clinical decision making. Because symptoms may develop slowly and indolently in chronic valve diseases and are often not recognized by patients and their physicians, the symptomatic, blood pressure, and electrocardiographic responses to exercise can help identify patients who would benefit from early valve repair or replacement. In addition, stress echocardiography has emerged as an important component of stress testing in patients with valvular heart disease, with relevant established and potential applications. Stress echocardiography has the advantages of its wide availability, low cost, and versatility for the assessment of disease severity. The versatile applications of stress echocardiography can be tailored to the individual patient with aortic or mitral valve disease, both before and after valve replacement or repair. Hence, exercise-induced changes in valve hemodynamics, ventricular function, and pulmonary artery pressure, together with exercise capacity and symptomatic responses to exercise, provide the clinician with diagnostic and prognostic information that can contribute to subsequent clinical decisions. Nevertheless, there is a lack of convincing evidence that the results of stress echocardiography lead to clinical decisions that result in better outcomes, and therefore large-scale prospective randomized studies focusing on patient outcomes are needed in the future. Advances in diagnosis and risk stratification, combined with steady progress in surgical valve replacement and repair, have led to improved outcomes of patients with valvular heart disease over the past 5 decades. The most important indication for surgical intervention in patients with hemodynamically significant aortic or mitral valve disease is the development of symptoms, as emphasized in recent guidelines (1,2). Because symptoms may develop slowly and indolently in these chronic conditions, many patients are unaware of subtle changes in effort tolerance, even when questioned directly by their physicians. Hence, guidelines of both the American College of Cardiology/American Heart Association (ACC/AHA) and the European Society of Cardiology (ESC) (1,2) have placed renewed emphasis on the role of exercise testing to provide objective evidence of exercise capacity and symptom status. In addition, although Doppler echocardiography at rest is the method of choice for assessing severity of valvular disease, there is a growing use of stress 2-dimensional and Doppler echocardiography to assess dynamic changes in hemodynamics in concert with the clinical findings of exercise testing.Stress echocardiography is well established for evaluating patients with coronary artery disease (CAD) (3-5). The role of stress echocardiography for the assessment of the hemodynamic consequences of valvular lesions was initially proposed in the 1980s (6,7) but only recently gained recognition by specialized and general guidelines (1,2,8,9). In a number...