Public Health and Epidemiology: Open Access
Longitudinal Blood Pressure Instability and Orthostatic Failure Following Viral Illness and Cardiac Intervention: A Patient-Investigator Case Analysis (2008â2026)
Abstract
Bruce H. Knox
This paper presents an 18-year longitudinal observation of blood pressure instability following viral infection, cardiac arrhythmia, and subsequent cardiac intervention. The timeline begins with Chikungunya virus infection in Indonesia in 2008, followed by viral cardiac involvement and hospitalisation in 2009. Persistent hypertension emerged in 2010 and proved resistant to conventional pharmacological management over the following decade. Progressive arrhythmia, including atrial fibrillation and frequent ectopic beats, culminated in ablation procedures in 2021 complicated by cardiac tamponade and emergency open-heart surgery. From 2022 onward, a new physiological pattern emerged characterised by severe supine hypertension combined with orthostatic hypotension without compensatory tachycardia. Orthostatic measurement demonstrated a drop from 215/105 mmHg supine to 145/85 mmHg within 30 seconds of standing, with heart rate increasing only from 55 to 58 beats per minute. The longitudinal dataset suggests impairment of autonomic cardiovascular regulation. These findings provide physiological support for the Knox Hypothesis, which proposes autonomic vulnerability as a systemic disease-modifying substrate following sequential physiological insults.