12 Lead Placement Standard Extended Left

**Semantic type:** Classification

**Definition:** An electrocardiogram (ECG) lead placement whereby the standard lead placement is modified by having leads V7, V8 and V9.

**Synonyms:** - STANDARD 12-LEAD EXTENDED LEFT - Standard 12-lead extended to the left by V7, V8, V9 - Standard 12-lead extended to the left by V7, V8, V9