| . | Common . | Uncommon . |
|---|---|---|
| PVBs characteristics | ||
| Morphology | LBBB/inferior axis | RBBB and wide QRS |
| RBBB and narrow QRS | LBBB/int. or superior axis | |
| Response to exercise | Decrease/suppression | Persistence/increase |
| Complexity | Isolated, monomorphic | Repetitive, polymorphic |
| Short coupling interval (R on T) | No | Yes |
| Clinical findings | ||
| Symptoms | No | Yes |
| Family history of premature SCDa or cardiomyopathy | No | Yes |
| ECG abnormalities | No | Yes |
| Imaging abnormalities | No | Yes |
| . | Common . | Uncommon . |
|---|---|---|
| PVBs characteristics | ||
| Morphology | LBBB/inferior axis | RBBB and wide QRS |
| RBBB and narrow QRS | LBBB/int. or superior axis | |
| Response to exercise | Decrease/suppression | Persistence/increase |
| Complexity | Isolated, monomorphic | Repetitive, polymorphic |
| Short coupling interval (R on T) | No | Yes |
| Clinical findings | ||
| Symptoms | No | Yes |
| Family history of premature SCDa or cardiomyopathy | No | Yes |
| ECG abnormalities | No | Yes |
| Imaging abnormalities | No | Yes |
LBBB, left bundle branch block; PVBs, premature ventricular beats; RBBB, right bundle branch block; SCD, sudden cardiac death.
Premature sudden cardiac death (SCD) is defined as that occurring before 40 years old in males and before 50 years old in females.
| . | Common . | Uncommon . |
|---|---|---|
| PVBs characteristics | ||
| Morphology | LBBB/inferior axis | RBBB and wide QRS |
| RBBB and narrow QRS | LBBB/int. or superior axis | |
| Response to exercise | Decrease/suppression | Persistence/increase |
| Complexity | Isolated, monomorphic | Repetitive, polymorphic |
| Short coupling interval (R on T) | No | Yes |
| Clinical findings | ||
| Symptoms | No | Yes |
| Family history of premature SCDa or cardiomyopathy | No | Yes |
| ECG abnormalities | No | Yes |
| Imaging abnormalities | No | Yes |
| . | Common . | Uncommon . |
|---|---|---|
| PVBs characteristics | ||
| Morphology | LBBB/inferior axis | RBBB and wide QRS |
| RBBB and narrow QRS | LBBB/int. or superior axis | |
| Response to exercise | Decrease/suppression | Persistence/increase |
| Complexity | Isolated, monomorphic | Repetitive, polymorphic |
| Short coupling interval (R on T) | No | Yes |
| Clinical findings | ||
| Symptoms | No | Yes |
| Family history of premature SCDa or cardiomyopathy | No | Yes |
| ECG abnormalities | No | Yes |
| Imaging abnormalities | No | Yes |
LBBB, left bundle branch block; PVBs, premature ventricular beats; RBBB, right bundle branch block; SCD, sudden cardiac death.
Premature sudden cardiac death (SCD) is defined as that occurring before 40 years old in males and before 50 years old in females.
This PDF is available to Subscribers Only
View Article Abstract & Purchase OptionsFor full access to this pdf, sign in to an existing account, or purchase an annual subscription.
