Persistence of uncontrolled hypertension post-cardiac rehabilitation in stable coronary patients

Abstract

In stable coronary heart disease, uncontrolled risk factors are strongly associated with incident myocardial infarction. We analysed the management of hypertension in 746 stable coronary patients recruited between 2005 and 2015 in a single-centre prospective study. Risk factors and pharmacological treatments were documented prior to and immediately after cardiac rehabilitation, and 1 year later. One year post-cardiac rehabilitation, all cardiovascular risk factors were significantly better controlled with the notable exception of hypertension: blood pressure (BP) <140/90 mmHg in 60% of the total population vs 49% (N = 450) of hypertensive patients (20% or 10%, according to the ACC/AHA 2017 or ESH/ESC guidelines, respectively). Of those who had achieved normotension by the end of cardiac rehabilitation, 42% had uncontrolled hypertension again 1 year later; in addition, body weight had increased, while physical activity and antihypertensive drug use had dropped (differences between controlled or uncontrolled hypertension at 1 year post-cardiac rehabilitation, NS). Three factors were correlated with BP elevations: discontinuation of betablockade: +7.9 mmHg; age >65 years: +6.2 mmHg; diabetes mellitus: +7.6 mmHg. Only 48% hypertensive patients were on guideline-recommended antihypertensive polytherapy. Although 28% were still hypertensive post-cardiac rehabilitation, and hypertension remained uncontrolled in 70% 1 year later, 61% antihypertensive prescriptions were not adjusted post-cardiac rehabilitation. One year post-cardiac rehabilitation, hypertension was the only cardiovascular risk factor that had not improved. This can be attributed to three main reasons, all associated with BP elevations: precipitous reduction in betablockade, physicians' inertia when faced with uncontrolled hypertension and lack of adherence to international guidelines.