RT Journal Article
SR Electronic
T1 Cardiac Mortality Assessment Improved by Evaluation of Cardiac Sympathetic Nerve Activity in Combination with Hemoglobin and Kidney Function in Chronic Heart Failure Patients
JF Journal of Nuclear Medicine
JO J Nucl Med
FD Society of Nuclear Medicine
SP 731
OP 740
DO 10.2967/jnumed.111.095786
VO 53
IS 5
A1 Takahiro Doi
A1 Tomoaki Nakata
A1 Akiyoshi Hashimoto
A1 Satoshi Yuda
A1 Takeru Wakabayashi
A1 Hidemichi Kouzu
A1 Naofumi Kaneko
A1 Mamoru Hase
A1 Kazufumi Tsuchihashi
A1 Tetsuji Miura
YR 2012
UL http://jnm.snmjournals.org/content/53/5/731.abstract
AB We examined prognostic interactions among cardiac autonomic function assessed by 123I-labeled metaiodobenzylguanidine (123I-MIBG) activity, hemoglobin, and kidney function in chronic heart failure patients. Anemia, chronic kidney disease, and impairment of cardiac sympathetic function have been shown as determinants of prognosis in heart failure patients, but there has been little information on their synergistic correlations with cardiac mortality. Methods: After evaluations of hemoglobin and estimated glomerular filtration rate (GFR), 468 heart failure patients with left ventricular ejection fraction less than 50% underwent cardiac 123I-MIBG imaging before discharge and were then followed up for a mean interval of 60.5 mo with a primary endpoint of cardiac death. Cardiac 123I-MIBG activity was quantified using heart-to-mediastinum ratio (HMR) and washout rate. Results: For 89 fatal cardiac events documented (19.0%), besides New York Heart Association class, multivariate Cox analysis revealed HMR, hemoglobin, and estimated GFR as significant independent determinants, with hazard ratios of 0.215 (P = 0.0129; 95% confidence interval [CI], 0.064–0.718), 0.821 (P = 0.0062; 95% CI, 0.708–0.946), and 0.984 (P = 0.0243; 95% CI, 0.970–0.998), respectively. Receiver-operating-characteristic analysis determined the thresholds for identifying patients at increased risk for cardiac death to be 1.57 for HMR, 11.9 g/dL for hemoglobin, and 46.4 mL/min/1.73 m2 for estimated GFR. Combining the 4 independent predictors incrementally (P < 0.05) improved prognostic powers maximally up to a global χ2 value of 97.3 compared with sole or other combinations. Conclusion: Hemoglobin, kidney function, and alterations of cardiac sympathetic nerve activity are independently and synergistically associated with increased cardiac mortality in chronic heart failure patients, together with New York Heart Association functional class.