Background. The American Heart Association recommends that patients with certain abnormal and prosthetic heart valves receive antibiotic prophylaxis before undergoing invasive dental treatment, owing to the risk of bacterial endocarditis, or BE. However, it is not known how many patients are aware that they have such conditions and understand such recommendations.
Methods. The authors conducted a study to determine how many male users of three U.S. Department of Veterans’ Affairs ambulatory medical care centers denied having a heart murmur, even though a murmur was noted in their medical record. The authors asked 637 potential subjects a series of questions to identify those who had a heart murmur that might place them at risk of developing BE. The authors then reviewed each subject’s medical records for documentation of a heart murmur.
Results. Four hundred ninety-seven dentate men (mean age: 61.0 years) denied having a heart murmur. Seventy (14.1 percent) of these men had documentation of a heart murmur in their medical records, and 13 (2.6 percent) had murmurs that were likely to be pathological. The failure to accurately report having a heart murmur and having a potentially pathological heart murmur were positively related to age (P = .001). Failure to accurately report having a heart murmur also was related to lower educational levels.
Conclusions. These results indicate that a substantially larger number of older men than younger men were unaware that they had a heart murmur. Since some of these murmurs necessitate administration of antibiotic prophylaxis before dental procedures, this failure to communicate their correct medical status may put them at risk of developing BE.
Clinical Implications. Dental health care providers should be aware that patient self-report may not be a reliable indicator of cardiac status, particularly in older patients.
