calculate_map: Calculate Mean Arterial Pressure

In JMLuther/tabletools: Helpful Tools to Make html Tables

Calculate Mean Arterial Pressure

Description

Returns the mean arterial pressure (MAP) from systolic (SBP) and diastolic (DBP) blood pressure measurements, using several methods. For brachial BP measurements, the formula MAP=DBP + 0.4 \cdot PP as described in Bos 2007 is typically preferred ("standard40"). Note the commonly used estimate of adding 33 methods reported by Gomez and by Razminia are also supported. The Gomez method is applied as the default, for use in calculation in renal glomerular pressure estimates.

Usage

calculate_map(sbp, dbp, hr = NA, method = "gomez")

Arguments

sbp	Systolic blood pressure, mmHg
dbp	Diastolic blood pressure, mmHg
hr	Heart rate, bpm
method	MAP formula, one of 'gomez', 'standard33', 'standard40', or 'razminia'. Uses "gomez" method by default. If no HR is supplied, the "standard" method is used. If 'standard' method is used without specifying it, due to no HR, a warning is issued.

Value

map as a single value, or vector of results

Examples

calculate_map(159, 46)
calculate_map("159", 46)
calculate_map("159", NA)
calculate_map(140, 90)
calculate_map(140, 90, 70, method="standard33")
calculate_map(140, 90, 70, method="standard40")
calculate_map(140, 90, 70, method = "gomez")
calculate_map(140, 90, 70, method="razminia")

hr <- 40:125
library(purrr)
plot(hr, map_dbl(hr, ~calculate_map(125, 73, .x, method = "gomez")), "l", lty=1, col="black",
     xlim = c(35,127.5), ylim = c(90,99),
     ylab = "Calculated MAP (mmHg)")
title("Methods comparison for HR-adjusted MAP calculation")
lines(hr, map_dbl(hr, ~calculate_map(125, 73, .x, method = "razminia")), lty=2, col="red")
abline(h=calculate_map(125,73, method="standard33"),lty=2, col="blue")
abline(h=calculate_map(125,73, method="standard40"),lty=2, col="steelblue")

JMLuther/tabletools documentation built on April 14, 2025, 3:09 a.m.