Low Blood Pressure When Standing: A Possible Early Sign of a “Body-First” Type of Parkinson’s

People with Parkinson’s disease (PD) who experience orthostatic hypotension—a sudden drop in blood pressure when standing up—are more likely to have symptoms like digestive issues, irregular heartbeats, acting out dreams during sleep, and unpredictable movement responses to medication. These issues are linked to a “body-first” type of Parkinson’s, where the disease may start in the gut and spread to the brain before affecting the rest of the body. What Is the “Body-First” Type of Parkinson’s? In Parkinson’s, a protein called alpha-synuclein clumps together in toxic formations (called Lewy bodies) that damage nerve cells. These clumps can form in different parts of the body: Brain-First Type: Starts in the brain, often triggered by toxic chemicals entering through the nose. Motor symptoms, like tremors, appear early. Body-First Type: Starts in the gut, spreading to the brain via the vagus nerve (which connects the brain to the digestive system). Non-motor symptoms, like blood pressure issues, acting out dreams, and digestive trouble, show up years before movement problems. The Role of Orthostatic Hypotension Orthostatic hypotension can occur on its own or as a side effect of Parkinson’s medication like levodopa. Researchers studied whether this blood pressure drop could signal the body-first type of Parkinson’s. Study Details: 928 patients with Parkinson’s (average age 62, living with PD for about 8 years). Patients were tested on and off their medication to check for blood pressure changes when standing up. Findings: 59% of patients experienced orthostatic hypotension, either spontaneously (24%) or triggered by levodopa (35%). Those with orthostatic hypotension were: Older and had more severe symptoms. More likely to experience motor fluctuations (when medication wears off). Almost three times as likely to act out their dreams (a condition linked to early Parkinson’s). More prone to hallucinations, cognitive issues, and autonomic problems (e.g., digestion and heartbeat regulation). Why This Matters These findings suggest that orthostatic hypotension could be an early warning sign of the body-first type of Parkinson’s. Identifying this subtype early might allow doctors to tailor treatments and focus on non-motor symptoms before movement issues begin. While more research is needed, including imaging tests and studies in early-stage patients, doctors may be able to confirm orthostatic hypotension with a simple levodopa challenge test.