The ECG You Are Looking at Has One P Wave

question 28

Multiple Choice

The ECG you are looking at has one P wave for every QRS complex and the PR interval is 0.30 sec. What is your interpretation?

• A) First-degree heart block
• B) Right-axis deviation
• C) Third-degree heart block
• D) Atrial hypertrophy

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Definitions:

Phenotypic Ratio

The proportional relationship between the different phenotypes (observable traits) produced by a genetic cross, often expressed in simplest whole numbers.

Heterozygous

Having two different alleles for a specific gene, one inherited from each parent.

Dominant

Relating to a trait that is expressed in an organism's phenotype, even when only one copy of the gene for that trait is present.

Genotype

The genotype is the genetic makeup of an organism, comprising all the DNA sequences that determine its inherited traits.