The Clinical Rationale: Four Reasons to Rest
The combination of leadless pacemaker extraction and conduction system pacing implantation is a high-stakes electrophysiology procedure. Preoperative physical optimization matters. Strenuous exercise the preceding day introduces compounding risks in four domains.
Patients undergoing leadless device procedures are on anticoagulation or a bridging protocol. High-intensity rowing elevates blood pressure and cardiac output, increasing hemorrhagic risk at venous access sites and the RV anchor.
Nocturnal non-capture in the Aveir VR indicates circadian capture threshold variability. Pushing cardiac output to peak rowing intensity with unreliable backup pacing is an unnecessary hemodynamic gamble.
Vigorous exercise transiently elevates high-sensitivity troponin T. In patients with baseline hs-TnT elevation — common with PICM or chronic device inflammation — a post-exercise spike confuses periprocedural biomarker interpretation.
Anesthesiologists prefer patients well-rested, euvolemic, and not sore. Post-row fatigue, thoracic DOMS, and dehydration complicate sedation management and patient positioning on the EP table.
Anticoagulation: Why It Matters for Athletes
Athletes accustomed to training often underestimate the interaction between vigorous exercise and anticoagulant therapy. During a one-hour rowing session at competitive intensity, systolic blood pressure can exceed 180 mmHg and cardiac output rises to 20–25 L/min. In a patient whose coagulation is intentionally suppressed for procedural safety, this hemodynamic load significantly raises the probability of periprocedural hematoma.
Additionally, the RV anchor site of the Aveir VR — even with intact endothelialization — remains a potential source of thrombus and bleeding during extraction. Elevated intraventricular pressures from intense exercise are a suboptimal preoperative state.
Leadless Pacemaker Capture Thresholds and Exercise
The Aveir VR leadless pacemaker, like all chronic cardiac leads, exhibits capture threshold variability driven by catecholamine tone, autonomic state, electrolyte flux, and body temperature. Patients experiencing nocturnal non-capture — typically during the nadir of sympathetic tone — have demonstrated that their safety margin is narrow.
During high-intensity rowing, sympathetic activation generally improves capture margins acutely. The risk is not failure during exercise itself — it is the post-exercise period of vagal rebound and autonomic instability, particularly relevant the night before surgery when thresholds may again rise unpredictably.
A patient with documented nocturnal non-capture should not further stress a system operating near its threshold margins within 24 hours of a planned extraction and upgrade procedure.
Troponin Dynamics in Athletic Patients
Exercise-induced troponin elevation is well-documented in endurance athletes. A rowing ergometer session at threshold intensity consistently produces measurable hs-TnT rises lasting 12–24 hours. In patients with pacing-induced cardiomyopathy (PICM) — where baseline hs-TnT is chronically elevated due to left ventricular remodeling and myocardial strain — this exercise-related spike overlaps with pathological elevations and can obscure the periprocedural cardiac injury signal that the team needs to track.
This is particularly relevant for the LBBAP upgrade context, where postoperative LV reverse remodeling monitoring begins immediately. A clean troponin baseline entering the procedure is clinically valuable.
What Is Acceptable Before Surgery
The goal the day before is to arrive at the procedure table rested, hydrated, and hemodynamically stable. The following guidance applies:
Light walking (20–30 min, conversational pace). Adequate oral hydration until NPO window. Normal sleep preparation.
Any vigorous aerobic or resistance exercise. Rowing ergometer, competitive cycling, running, or weightlifting.
Follow anesthesia NPO instructions strictly. No electrolyte drinks within the restricted window.
Returning to Rowing After LBBAP Implantation
LBBAP lead fixation and fibrous encapsulation typically stabilize within 2–4 weeks. Return to competitive rowing should be cleared after follow-up device interrogation confirms stable pacing thresholds, sensing, and impedance — and after the patient's electrophysiologist explicitly authorizes high-intensity training.
For competitive rowers, LBBAP offers a meaningful physiologic advantage over right ventricular pacing: by delivering near-native left bundle branch conduction, it preserves interventricular synchrony and LV ejection fraction. Athletes who have experienced PICM from chronic RV pacing often notice measurable improvement in cardiac output and exercise capacity following successful conduction system pacing upgrade.
The 2–4 week wait is a small investment before returning to the sport with a hemodynamically superior device.
Frequently Asked Questions
Is it safe to row the day before pacemaker surgery?
No. Vigorous rowing the day before Aveir VR removal and LBBAP implantation is contraindicated. It increases bleeding risk in the setting of anticoagulation, places hemodynamic stress on a system with uncertain pacing reserve, elevates hs-TnT in ways that confuse periprocedural biomarker monitoring, and leaves the patient suboptimally prepared for sedation and surgical positioning.
Why does exercise increase bleeding risk before pacemaker removal?
Patients undergoing cardiac device procedures have anticoagulation either continued, bridged, or recently held. High-intensity rowing raises blood pressure and cardiac output substantially. In the setting of anticoagulant therapy, elevated venous and arterial pressures increase the risk of hematoma at vascular access sites and at the intracardiac anchor point of the leadless device during extraction.
Can exercise affect troponin levels before cardiac surgery?
Yes. Strenuous aerobic exercise reliably produces a transient rise in high-sensitivity troponin T (hs-TnT) that persists for 12–24 hours. In patients with elevated baseline hs-TnT from pacing-induced cardiomyopathy, this exercise-induced increment can interfere with the periprocedural cardiac injury signal that the clinical team needs to interpret accurately.
What is the Aveir VR leadless pacemaker?
The Abbott Aveir VR is a miniaturized single-chamber leadless pacemaker implanted directly into the right ventricle via femoral vein access, without transvenous leads or a subcutaneous generator pocket. It provides VVI(R) pacing and is retrievable. Its limitations include lack of AV synchrony and the potential for pacing-induced cardiomyopathy with chronic right ventricular pacing.
What is LBBAP and why is it preferred over RV pacing?
Left Bundle Branch Area Pacing (LBBAP) is a form of conduction system pacing that delivers electrical activation via the left bundle branch, producing near-physiologic left ventricular conduction and preserved interventricular synchrony. Compared to right ventricular pacing, LBBAP is associated with narrower paced QRS duration, lower rates of pacing-induced cardiomyopathy, and better long-term LV ejection fraction preservation in patients requiring high-burden pacing.
When can I return to rowing after LBBAP implantation?
Most electrophysiologists recommend resuming vigorous exercise 2–4 weeks after LBBAP implantation, once stable lead fixation is confirmed by device interrogation showing stable thresholds, sensing, and impedance. Competitive rowing should be explicitly authorized by your electrophysiologist based on follow-up data.