Arrhythmias in dogs and cats: diagnosis and treatment
This lecture will focus first on electrocardiographic (ECG) interpretation using an interpretative algorithm. Differentiation between rhythms of sinus origin and rhythms of non-sinus origin (supraventricular and ventricular ectopy) will be discussed. Abnormalities of conduction such as atrioventricular (AV) block and bundle branch blocks (BBBs) will be discussed. Variations in rate and regularity of sinus rhythms will be discussed. ECG examples of common arrhythmias in dogs and cats will be presented, again with discussion regarding interpretation. The ECG portion of the talk will be followed by a discussion centered on the treatment of arrhythmias in dogs and cats. Criteria for treatment will be outlined first. Then antiarrhythmic drugs (sodium channel blockers such as lidocaine and procainamide, β-blockers such as atenolol and esmolol, potassium channel blockers such as sotalol and amiodarone, and calcium channel blockers such as diltiazem), positive chronotropes (methyl xanthines such as terbutaline and theophylline, vagolytics such as hyoscyamine, and sympathomimetics), and pacemaker implantation will be covered. Electrical cardioversion will be briefly presented.
Approach to cardiac disease for the general practitioner
This talk will cover various aspects of the diagnosis and treatment of cardiac diseases in dogs and cats. Classic signalment and history for specific diseases will be covered first. Physical exam findings (heart rate and rhythm, heart sounds, murmurs, respiratory rate/ effort and lung sounds, systemic arterial pulses, venous fill) will be discussed next in order to optimize the information gleaned from physical exam. Many heart diseases can be correctly suspected based on signalment, history, and physical exam findings. Tests used to confirm a diagnosis of specific heart diseases will be reviewed, including thoracic radiographs, echocardiogram, and angiography. This section of the talk will concentrate mainly on tests available at many primary practices, with some examples of diagnostic tests available at specialty practices. Finally, medical treatment of the clinical syndromes associated with heart diseases will be covered. Clinical syndromes include heart failure (left and right sided), cardiac tamponade, thromboembolism, and arrhythmias. The section on arrhythmias will not go into depth since this topic will be covered in another talk.
Common cases in small animal cardiology
This talk will cover real-life clinical scenarios that are commonly encountered in small animal veterinary practice (cardiac cases in dogs and cats). Specific case illustrations will be used as a platform to discuss entire cardiac workups from beginning to end. In dogs, examples of case illustrations will include degenerative valve disease, dilated cardiomyopathy (DCM), arrhythmogenic right ventricular cardiomyopathy (ARVC) or Boxer cardiomyopathy, patent ductus arteriosus (PDA), subaortic stenosis (SAS), and pulmonic stenosis (PS). In cats, examples of case illustrations will include hypertrophic cardiomyopathy (HCM) and restrictive cardiomyopathy (RCM). Each case will progress quickly through signalment, history, physical exam, diagnostics, prognosis, and treatment. The lecture will cover the highlights of each case in order to address a number of common diseases, rather than going too far in depth in the coverage of any single case.