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Studies show cardiac resynchronization therapy extends life, reduces hospital readmissions

Medtronic, Inc. has announced new data supporting the clinical and economic value of its cardiac resynchronization therapy (CRT) devices for the treatment of , including a significant reduction in all-cause 30-day readmissions after hospitalizations. Additionally, who benefited early from CRT lived longer and consumed fewer hospital resources than patients who did not experience early benefit from the therapy. These new data were featured in separate presentations at the American Heart Association’s Scientific Sessions 2014 in Chicago.

“The efficient management of heart failure is a growing priority for healthcare,” said Linda Gillam, M.D., MPH, chair, Cardiovascular Medicine, Atlantic Health System. “These new economic data reinforce the important benefits of CRT and demonstrate its value, not only for patient health, but also the fiscal health of the hospitals and health systems that treat them.”

One million people with heart failure are hospitalized each year, and 25 percent of them will be re-hospitalized within 30 days.[1] Additionally, heart failure consumes intensive resources during hospitalizations and continues to cause problems following hospital stays, with six-month readmission rates of 50 percent [2,3,4] and mortality rates of approximately 30 percent. [5]

Lower 30-Day Readmissions with Medtronic CRT Devices

In the meta-analysis titled, “Reduced 30-Day Hospital Readmissions in Systolic Heart Failure Patients with Cardiac Resynchronization Therapy: Evidence from Five Randomized Controlled Trials,” researchers analyzed pooled data from five Medtronic-sponsored randomized controlled trials (CARE-HF, MIRACLE, MIRACLE-ICD, RAFT and REVERSE) involving 3,872 patients, to determine whether CRT reduces the rate of all-cause readmission within 30 days of a heart failure hospitalization. Among the 678 subjects with an index heart failure hospitalization, there was a 26 percent relative reduction of hospital readmissions in patients treated with CRT. For patients with more advanced heart failure, Class III/IV, the benefit was higher, at 31 percent, than Class II patients at 10 percent.

Clinical and Economic Value of CRT

In a separate presentation titled, “Clinical and Economic Value of Maximizing Response to Cardiac Resynchronization Therapy (CRT): Evidence from Five Randomized Controlled Trials,” researchers found that patients who improved or remained unchanged six months after CRT were projected to live longer and consumed fewer hospital resources (i.e. fewer and/or shorter heart failure-related hospitalizations), than patients who worsened.

Results were measured using the Packer Clinical Composite Score (CCS), which analyzes a patient’s condition as improved, unchanged or worsened using variables including death, heart failure hospitalization, a patient global assessment questionnaire, and change in symptoms as measured by New York Heart Association (NYHA) heart failure class.

The pooled analysis of five Medtronic-sponsored trials (MIRACLE, MIRACLE-ICD, InSync III Marquis, PROSPECT and Adaptive CRT) identified 1,603 total patients, 1,089 of which improved (68 percent), 235 remained unchanged (15 percent) and 279 worsened (17 percent). Patients who improved or remained unchanged at six months of receiving CRT were projected (using Markov modeling) to live approximately eight years compared to less than two years in the worsened group.

Additionally, heart failure hospitalization rates in the first year after the six-month clinical composite score assessment were 0.13 for those who improved, 0.27 for those who were unchanged and more than three times higher (0.90) for those who worsened (p<0.0001).

“Medtronic is committed to bringing forward sound innovation that improves patients’ lives and provides economic value by reducing cost to the healthcare system,” said David Steinhaus, M.D., vice president and general manager, Heart Failure, and medical director for the Cardiac Rhythm and Heart Failure Business at Medtronic. “Cardiac resynchronization therapy is an important tool in the management of heart failure and these data are a prime example of how innovations, including Medtronic’s AdaptivCRT pacing algorithm, can enhance the clinical and economic value of an already proven therapy.”


1 http://newsroom.heart.org/news/six-steps-could-cut-heart-failure-readmissions

2 Krumholz HM, Merrill AR, Schone EM, Schreiner GC, Chen J, Bradley EH, Wang Y, Wang Y, Lin Z, Straube BM, Rapp MT, Normand SL, Drye EE. Patterns of hospital performance in acute myocardial infarction and heart failure 30-day mortality and readmission. Circ Cardiovasc Qual Outcomes. 2009;2:407- 413

3 Joynt KE, Jha AK. Who has higher readmission rates for heart failure, and why? Implications for efforts to improve care using financial incentives. Circ Cardiovasc Qual Outcomes. 2011;4:53-59.

4 Chun S, Tu JV, Wijeysundera HC, Austin PC, Wang X, Levy D, Lee DS. Lifetime analysis of hospitalizations and survival of patients newly admitted with heart failure. Circ Heart Fail. May 2, 2012. doi 10.1161/ CIRCHEARTFAILURE.111.964791.

5 Loh J, et al. Temporal Trends in Treatment and Outcomes for Advanced Heart Failure With Reduced Ejection Fraction From 1993-2010. Circulation: Heart Failure. 2013; 6:411-419. Available at http://circheartfailure.ahajournals.org/content/6/3/411.full.html?ijkey=7BfsyD7wNlUfm8t&keytype=ref

Source: Medtronic Inc.