Angiotensin-Converting Enzyme Inhibitor Use in Elderly Patients Hospitalized with Heart Failure and Left Ventricular Systolic Dysfunction

Captopril Increases Survival after Whole-Body Ionizing Irradiation but Decreases Survival when Combined with Skin-Burn Trauma in Mice

Past and recent radiation events have involved a high incidence of radiation combined injury where victims often succumb to serious infections as a consequence of bacterial translocation and subsequent sepsis. The risk of infection is exacerbated in radiation combined skin-burn injury (RCI), which increase vulnerability. Furthermore, no suitable countermeasures for radiation combined skin-burn injury have been established. In this study, we evaluated captopril as a potential countermeasure to radiation combined skin-burn injury. Captopril is an FDA-approved angiotensin-converting enzyme inhibitor that was previously reported to stimulate hematopoietic recovery after exposure to ionizing radiation. Female B6D2F1/J mice were whole-body bilateral (60)Co gamma-photon irradiated (dose rate of 0.4 Gy/min) with 9.5 Gy (LD70/30 for RCI), followed by nonlethal dorsal skin-burn injury under anesthesia (approximately 15% total-body surface-area burn). Mice were provided with acidified drinking water with or without dissolved captopril (0.55 g/l) for 30 days immediately after injury and were administered topical gentamicin (0.1% cream; day 1-10) and oral levofloxacin (90-100 mg/kg; day 3-16). Surviving mice were euthanized on day 30 after analyses of water consumption, body weight and survival. Our data demonstrate that, while treatment with captopril did mitigate mortality induced by radiation injury (RI) alone (55% captopril vs. 80% vehicle; n = 20, P < 0.05), it also resulted in decreased survival after radiation combined skin-burn injury (22% captopril vs. 41% vehicle; n = 22, P < 0.05). Moreover, captopril administration via drinking water produced an uneven dosage pattern among the different injury groups ranging from 74 ± 5.4 to 115 ± 2.2 mg/kg/day. Captopril treatment also did not counteract the negative alterations in hematology, splenocytes or bone marrow cellularity after either radiation injury or radiation combined skin-burn injury. These data suggest that captopril may exert its actions differently between the two injury models (RI vs. RCI) and that captopril dosing, when combined with topical and systemic antibiotic treatments, may not be a suitable countermeasure for RCI.

The 2010 Canadian Cardiovascular Society guidelines for the diagnosis and management of heart failure update: Heart failure in ethnic minority populations, heart failure and pregnancy, disease management, and quality improvement/assurance programs

Since 2006, the Canadian Cardiovascular Society heart failure (HF) guidelines have published annual focused updates for cardiovascular care providers. The 2010 Canadian Cardiovascular Society HF guidelines update focuses on an increasing issue in the western world - HF in ethnic minorities - and in an uncommon but important setting - the pregnant patient. Additionally, due to increasing attention recently given to the assessment of how care is delivered and measured, two critically important topics - disease management programs in HF and quality assurance - have been included. Both of these topics were written from a clinical perspective. It is hoped that the present update will become a useful tool for health care providers and planners in the ongoing evolution of care for HF patients in Canada.

The impact of patient-specific quality-of-care report cards on guideline adherence in heart failure

BACKGROUND

It is unknown if physician education through heart failure (HF) patient-specific quality-of-care report cards (HFRC) impacts outpatient HF guideline adherence.

METHODS

A prospective pre-post design study was performed to test the hypothesis that a one-time, patient-specific HFRC delivered to physicians after HF patient (ejection fraction < or = 40%) discharge would lead to improved HF guideline adherence compared with control practitioners. Patients were contacted at 1, 3, and 6 months after discharge to assess medication usage and intolerances. Six month quality score (QS) was the primary end point, calculated as the sum of adherence to 4 medication performance measures (angiotensin-converting enzyme inhibitors/angiotensin receptor blockers, beta-blockers, aldosterone inhibitors, and warfarin for atrial fibrillation).

RESULTS

The mean QS at discharge was 3.10 +/- 0.78 in controls (n = 189) and 3.25 +/- 0.79 in the HFRC group (n = 76, P = .11). Controlling for discharge QS, the HFRC resulted in a significantly improved QS at 3 months (beta = .11, P = .023) but not at the 6-month primary end point (beta = .084, P = .14). Controlling for baseline medication use, patients of practitioners receiving the HFRC were 32.5 (P = .019) and 8.5 (P = .030) times more likely to receive, or have a documented contraindication to, an angiotensin-converting enzyme inhibitor/angiotensin receptor blocker at 3 and 6 months, respectively. There were no significant differences in indicated beta-blocker, aldosterone inhibitor, or warfarin prescriptions at any follow-up.

CONCLUSIONS

Although one-time patient-specific report cards result in short-term statistically significant improvements in outpatient evidence-based HF care, the gain does not translate into sustained improvements in quality of care.

Long-term trends of angiotensin-converting enzyme inhibitor and angiotensin-receptor blocker use after heart failure hospitalization in community-dwelling seniors

BACKGROUND

Despite multiple trials demonstrating the benefit of angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin-receptor blockers (ARBs) for heart failure (HF) patients with systolic dysfunction, studies have reported underuse of these drugs. Little is known about recent trends in the use of ACEI/ARB in community-dwelling seniors.

METHODS

Using administrative data from pharmacy assistance programs and Medicare in two states, we identified all patients hospitalized for HF between 1995 and 2004 who survived >or=90 days after discharge. The study outcomes were filled prescriptions for an ACEI or ARB within 90 days after discharge. We assessed age, gender, race, and comorbidities. Multivariate modified Poisson regression was used to analyze temporal trends.

RESULTS

Of 54,453 patients identified, 26,166 (48%) filled prescriptions for ACEIs/ARBs within 90 days after discharge from HF, but utilization of these drugs did not increase during the decade studied. Among those who were on ACEI/ARB before the index hospitalization, 74% filled at least one ACEI/ARB prescription within 90 days after the hospitalization. These results were similar among the subgroup of HF patients with prior MI.

CONCLUSIONS

Use of ACEI/ARB after discharge from HF hospitalization in seniors did not increase over the decade of observation and may still be inadequate.