Which chest electrode is placed in the fifth intercostal space at the left midclavicular line?

Giải thích

V4 is placed in the fifth intercostal space at the left midclavicular line, and it is located before V3 because V3 is defined as the midpoint between V2 and V4. V5 goes at the left anterior axillary line and V6 at the left midaxillary line, both level with V4 rather than following the rib spaces.