The cardiac patient: antibiotic prophylaxis concerns fewer patients than people think

The cardiac patient raises two recurring questions in practice: whether antibiotic prophylaxis is needed and whether anticoagulant therapy should be stopped. Both have narrower answers than is generally assumed.

On prophylaxis, the indications have progressively narrowed. The main international guidelines now reserve it for a limited group of high-risk conditions.

These typically include those with a prosthetic valve or prosthetic material used for valve repair, those who have had an episode of infective endocarditis, and certain congenital heart conditions.

Conditions once included now fall outside, such as mitral valve prolapse and many acquired valve disorders, and this is the part causing most confusion because patients recall advice received years earlier.

Where indicated, prophylaxis covers procedures involving manipulation of gingival tissue or the periapical region, and a professional hygiene appointment falls within that definition.

The point the guidelines emphasise, and one worth passing on to the patient, is however different: the daily bacteraemia produced by chewing and brushing in an inflamed mouth exceeds in cumulative exposure that of a single appointment.

It follows that controlling gingival inflammation protects an at-risk patient more than prophylaxis itself, and it is an argument that motivates better than any generic recommendation.

On anticoagulant therapy the orientation is clearly against stopping. The thromboembolic risk of interruption exceeds the bleeding risk of a hygiene appointment.

Periodontal instrumentation in a patient with stable anticoagulation is carried out without altering the therapy, using local measures to control bleeding.

Coordination with the physician remains necessary for surgical procedures, but routine hygiene does not ordinarily require any change.

Local measures are simple and sufficient: gauze compression, topical tranexamic acid where indicated, atraumatic instrumentation, and shorter appointments covering limited sectors.

A patient on antiplatelet therapy requires neither interruption nor particular precautions beyond the ordinary, and it is a worry raised more often than necessary.

In summary: prophylaxis now concerns a narrow group of high-risk conditions, gingival inflammation exposes more than one appointment does, anticoagulants are not stopped for hygiene, local measures suffice, and antiplatelet therapy requires no particular precautions.