An open-source program to analyze spontaneous sympathetic neurohemodynamic transduction

The sympathetic nervous system is important for the beat-by-beat regulation of arterial blood pressure and the control of blood flow to various organs. Microneurographic recordings of pulse-synchronous muscle sympathetic nerve activity (MSNA) are used by numerous laboratories worldwide. The transduction of hemodynamic and vascular responses elicited by spontaneous bursts of MSNA provides novel, mechanistic insight into sympathetic neural control of the circulation. Although some of these laboratories have developed in-house software programs to analyze these sympathetic transduction responses, they are not openly available and most require higher level programming skills and/or costly platforms. In the present paper, we present an open-source, Microsoft Excel-based analysis program designed to examine the pressor and/or vascular responses to spontaneous resting bursts of MSNA, including across longer, continuous MSNA burst sequences, as well as following heartbeats not associated with MSNA bursts. An Excel template with embedded formulas is provided. Detailed written and video-recorded instructions are provided to help facilitate the user and promote its implementation among the research community. Open science activities such as the dissemination of analytical programs and instructions may assist other laboratories in their pursuit to answer novel and impactful research questions regarding sympathetic neural control strategies in human health and disease.NEW & NOTEWORTHY The pressor responses to spontaneous bursts of muscle sympathetic nerve activity provide important information regarding sympathetic regulation of the circulation. Many laboratories worldwide quantify sympathetic neurohemodynamic transduction using in-house, customized software requiring high-level programming skills and/or costly computer programs. To overcome these barriers, this study presents a simple, open-source, Microsoft Excel-based analysis program along with video instructions to assist researchers without the necessary resources to quantify sympathetic neurohemodynamic transduction.