Methods and devices for placement of electrocardiogram leads

A sternal measurement device (100) comprising:

• a. a ruler base (110) having a first end (111), a second end (112) and a first set of sternal length measurements (118a) disposed along a surface (115) of the ruler base in ascending order from the first end (111) to the second end (112), said sternal length measurements (118a) corresponding to a length of the ruler base (110);
• b. a slide base (120) slidably connected to the ruler base (110), the slide base (120) having a first end (121), a second end (122), and a second set of sternal length measurements (118b) disposed along a surface (125) of the slide base, wherein a first sternal length measurement (118b) disposed at the second end (122) of the slide base is a unit of length greater than a last sternal length measurement (118a) disposed on the second end (112) of the ruler base, wherein the second set of sternal length measurements (118b) are in ascending order from the second end (122) to the first end (121) of the slide base;
• and
• c. a set of intercostal length measurements (128) disposed on the surface (125) of the slide base, each intercostal length measurement (128) positioned next to one of the sternal length measurements (118b) such that each sternal length measurement (118b) has a corresponding intercostal length measurement (128);
• wherein the sternal measurement device (100) measures a sternal length between a sternal notch and a xiphoid process, wherein the sternal length is the maximum sternal length measurement displayed by the device (100) when the first end (111) of the ruler base is placed at the sternal notch and the second end (122) of the slide base is placed at the xiphoid process, wherein the intercostal length measurement is determined by the maximum sternal length measurement.